"Shoichi Fujimori,Yu Kawakami,Masatoshi Kokubu,Masaaki Umehara,Wayne Rossman,Kotaro Yamada,Seong-Deog Yang","Analytic extensions of constant mean curvature one geometric catenoids in de Sitter 3-space",,"Differential geometry and its applications",,"Volume 84",,,2022,Oct.
"Shoichi Fujimori,Yu Kawakami,Masatoshi Kokubu,Wayne Rossman,Masaaki Umehara,Kotaro Yamada","Exceptional constant mean curvature one  catenoids in de Sitter 3-space",,,,,,,2019,Jan.
"Shoichi Fujimori,Udo Hertrich-Jeromin,Masatoshi Kokubu,Masaaki Umehara,Kotaro Yamada","Quadrics and Scherk towers",,"Monatshefte f?r Mathematik","Springer-Verlag",,,,2017,July
"Atsufumi Honda,Miyuki Koiso,Masatoshi Kokubu,Masaaki Umehara,Kotaro Yamada","Mixed type surfaces with bounded mean curvature in 3-dimensional space-times",,"Differential Geometry and its Applications",,"Vol. 52",,"pp. 64-77",2017,June
"Shoichi Fujimori,Yu Kawakami,Masatoshi Kokubu,Wayne Rossman,Masaaki Umehara,Kotaro Yamada","Zero mean curvatrue entire graphs of mixed type in Lorentz-Minkowski 3-space",,"The Quarterly Journal of Mathematics",,"Volume 67","No. 4","pp. 801-837",2016,Dec.
"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
"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
"Masatoshi Kokubu,Wayne Rossman,Masaaki Umehara,Kotaro Yamada","Asymptotic behavior of flat surfaces in hyperbolic 3-space",,"J. Math. Soc. Japan",,"Vol. 61","No. 3","Page 799-852",2009,Sept.