"Hasegawa Masaru,Honda Atsufumi,Kosuke Naokawa,Masaaki Umehara,Kotaro Yamada","Intrinsic invariants of Cross Caps",,"Selecta Math. New Ser.",,"Vol. 20",,"pp. 769--785",2014,July
"Shoichi Fujimori,Wayne Rossman,Masaaki Umehara,Kotaro Yamada,Seong-Deog Yang","Embedded triply periodic zero mean curvature surfaces",,"Michigan Math. J.",,"Vol. 63","No. 1","pp. 189--207",2014,Mar.
"Francisco Martin,Masaaki Umehara,Kotaro Yamada","Flat surfaces in hyperbolic 3-space whose hyperbolic Gauss maps are bounded",,"Revista Matem?tica Iberoamericana",,"Vol. 30","No. 1","pp. 309--316",2014,Mar.
"Leoner Ferrer,Francisco Martin,Masaaki Umehara,Kotaro Yamada","A construction of a complete bounded null curves in C^3",,"Kodai Mathematical Journal",,"Vol. 37","No. 1","pp. 59--96",2014,Mar.