Morphisms from a very general hypersurface (with Y. Luo and D.-Q. Zhang)

preprint-arXiv:1908.06894

Positivity of the tangent bundle of rational surfaces with nef anticanonical divisor (with H. Kim and J.-S. Kim)

preprint-arXiv:2408.14411

Smooth projective surfaces with pseudo-effective tangent bundles (with J. Jia and G. Zhong)

J. Math. Soc. Japan (2024), 1-28

Lagrangian fibration structure on the cotangent bundle of a del Pezzo surface of degree 4 (with H. Kim)

preprint-arXiv:2210.01317

Bigness of the tangent bundle of a Fano threefold with Picard number two (with H. Kim and J.-S. Kim)

to appear in Nagoya Math. J., preprint-arXiv:2201.06351

Normalization of congruence of bitangents to a hypersurface in ${\mathbb P}^3$ (with H. Kim)

J. Pure Appl. Algebra 227 (2023) no. 2, 107183

Vanishing cohomology on a double cover (with G. Pirola)

Bull. Lond. Math. Soc. 53 (2021) no. 2, 370–379

The moduli space of smooth ample hypersurfaces in abelian varieties (with F. Catanese)

Adv. Math. 365 (2020), 107040

Deformation of a generically finite map to a hypersurafce embedding (with F. Catanese)

J. Math. Pures Appl. 125 (2019), 175-188

Grothendieck duality and ${\mathbb Q}$-Gorenstein morphism (with N. Nakayama)

Publ. Res. Inst. Math. Sci. 54 (2018), 517-648

Exceptional collections in Dolgachev surfaces associated with degenerations (with Y. Cho)

Adv. Math. 324 (2018), 394-436

On rational maps from the product of two general curves (with G. Pirola)

Ann. Sc. Norm. Super, Pisa Cl. Sci. XVI (2016) no. 4, 1139-1152

On subfields of the function field of a general surface in ${\mathbb P}^3$ (with G. Pirola)

IMRN 2015 (2015), 13245-13259

Deformations of product-quotient surfaces and reconstruction of Todorov surfaces via $\mathbb{Q}$-Gorenstein smoothing (with F. Polizzi)

Adv. Stud. Pure Math., 65, Math. Soc. Japan, Tokyo, 2015

Stability of hypersurface sections of quadric threefolds (with S. Byun)

Sci. China Math. 58 (2015) no. 3, 479-486

Birational contraction of genus two tails in the moduli space of genus four curves. I (with D. Hyeon)

IMRN. 2014 (2014), 3735-3757

Involutions on a surface ofgeneral type with $p_g=q=0, K^2=7$ (with Y. Shin)

Osaka J. Math. 51 (2014), 121-139

Simply connected surfaces of general type in positive characteristic via deformation theory (with N. Nakayama)

Proc. London Math. 106 (2013), 225-286

Construction of surfaces of general type from elliptic surfaces via $\mathbb{Q}$-Gorenstein smoothing (with J. Keum and H. Park)

Math. Z. 272 (2012), 1243-1257

Slopes of smooth curves on a Fano manifold (with J.-M. Hwang, H. Kim and J. Park)

Bull. London Math. Soc. 43(5) (2011), 827-839

Complex structure on the rational blowdown of sections in $E(4)$

A construction of Horikawa surface via $\mathbb{Q}$-Gorenstein smoothings (with J. Park)

Log minimal model program for the moduli space of stable curves of genus three, (with D. Hyeon)

Stability computation via Gröbner basis (with B. Hassett and D. Hyeon)

A new look at the moduli space of hyperelliptic curves (with D. Hyeon)

Stability of bicanonical curves of genus three (with D. Hyeon)

A complex surface of general type with $p_g=0, K^2=2$ and $H_1=\mathbb{Z}/2\mathbb{Z}$ (with J. Park)

Chow stability criterion in terms of log canonical threshold

A simply connected surface of general type with $p_g=0$ and $K^2=2$ (with J. Park)

Invent. Math. 170, (2007) 483-505

Rational curves on blowing-ups of projective spaces (with B. Kim and K. Oh)

Michigan Math. J. 55 (2007) 335-345

Stability of tri-canonical curves of genus two (with D. Hyeon)

Math. Ann. 337 (2007), no. 2, 479-488

Special members in the bicanonical pencil of Godeaux surfaces

Osaka J. Math. 42 (2005) 163-171

Log canonical thresholds of semistable plane curves (with H. Kim)

Math. Proc. Cambridge Philos. Soc. 137 (2004), no. 2, 273-280

Projective systems and perfect codes with a poset metric

Finite Fields and Their Applications, 10 (2004) 105-112

Topological Euler numbers in a semi-stable degeneration of surfaces

Proc. Japan Acad. 79, Ser. A (2003) 42-45

Deformation theory of smoothable semi log canonical surfaces

Proceedings of the Symposium on Algebraic Geometry in East Asia, (2002) 175-185, World Scientific Publishing Co. Pte. Ltd.

Bounds and $\mathbb{Q}$-Gorenstein smoothings of smoothable stable log surfaces

Symposium in honor of C. H. Clemens, Contemp. Math. 312 (2002) 153-162

Interpretation of the deformation space of a determinantal Barlow surface via smoothings

Proc. Amer. Math. Soc. 130 (2002) 963-969

Bicanonical pencil of a determinantal Barlow surface

Trans. Amer. Math. Soc. 353 (2001), no. 3, 893-905

Semistable degeneration of Godeaux surfaces with relatively nef canonical bundle

Math. Nachr. 219 (2000), 135-146

Fixed locus of an involution acting on a Godeaux surface (with J. Keum)

Math. Proc. Cambridge Philos. Soc. 129 (2000), no. 2, 205-216

A compactification of a family of determinantal Godeaux surfaces

Trans. Amer. Math. Soc. 352 (2000), no. 11, 5013-5023

Numerical bounds for degenerations of surfaces of general type

Internat. J. Math. 10 (1999), no. 1, 79-92