l Fujimori, S.; Kim, Y. W.; Koh, S.-E.; Rossman, W.; Shin, H.; Takahashi, H.; Umehara, M.; Yamada, K.; Yang, S.-D.

Zero mean curvature surfaces in L 3   $\bold{L}^3$containing a light-like line. C. R. Math Acad. Sci. Paris 350 (2012), no. 21-22

l Kim, Young Wook; Koh, Sung-Eun; Shin, Heayong; Yang, Seong-Deog

Helicoidal minimal surfaces in H 2 ×R  $\Bbb H^2\times\Bbb R$. Bull. Aust. Math. Soc. 86 (2012), no. 1, 135–149.

l Kim, Young Wook; Koh, Sung-Eun; Shin, Heayong; Yang, Seong-Deog

Spacelike maximal surfaces, timelike minimal surfaces, and Björling representation formulae. J. Korean Math. Soc. 48 (2011), no.5, 1083–1100.

l Kim, Young Wook; Koh, Sung-Eun; Shin, Heayong; Yang, Seong-Deog

Helicoids in S 2 ×R $\Bbb S^2\times\Bbb R$and H 2 ×R  $\Bbb H^2\times\Bbb R$. Pacific J. Math. 242 (2009), no.2, 281–297.

l Kim, Young Wook; Koh, Sung-Eun; Shin, Heayong; Yang, Seong-Deog

Generalized surfaces with constant H/K $H/K$in Euclidean three-space. Manuscripta Math. 124 (2007), no. 3, 343–361.

l Shin, Heayong

Degree 1 $1$singularities of energy minimizing maps to a bumpy sphere. Math. Ann. 293 (1992), no. 3, 509–521.

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