"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
"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
"Liu, H.,Umehara, M.,Kotaro Yamada","The duality of conformally flat manifolds",,"Bulletin of the Brazilian Mathematical Society",,"Vol. 42","No. 1","pp. 131-152",2011,