"Shoichi Fujimori,Yu Kawakami,Masatoshi Kokubu,Wayne Rossman,M. Umehara,Kotaro Yamada","CMC-1 trinoids in H3 and metrics of constant curvature one with conical singularities on S^2",,"Prooc. Japan Academy Ser. A",,"Vol. 87",,"pp. 144--149",2011,June
"Kentaro Saji,Masaaki Umehara,Kotaro Yamada","A_2-singularities of hypersurfaces with non-negative sectional curvature in Euclidean space",,"Kodai Math. J.",,"Vol. 34",,"pp. 390--409",2011,June
"Yoshhisa Kitagawa,Masaaki Umehara","Extrinsic diameter of immersed flat tori in S^3",,"Geometriae Dedicata",,"Vol. 155",,"pp. 105--140",2011,June
"Kokubu Masatoshi,Masaaki Umehara","Orientability of linear Weingarten surfaces, spacelike CMC-1 surfaces and maximal surfaces",,"Mathematische Nachrichten",,"Vol. 384",,"pp. 1903--1918",2011,June
"Masaaki Umehara,Kotaro Yamada","Applications of a completeness lemma in minimal surface theory to various classes of surfaces",,"Bull. Lond. Math. Soc.",,"Volume 43","No. 1","Page 191-199",2011,May
"Masaaki Umehara","A simplification of the proof of Bol's conjecture on sextactic points",,"Proc. Japan Acad. Ser. A Math. Sci.",,"Volume 87","No. 1","Page 10-12",2011,Jan.