"Masaaki Umehara,Kotaro Yamada","Surfaces with light-like points in Lorentz-Minkowski 3-space with applications","International Meeting on Lorentzian Geometry GELOMA 2016","Springer Proceedings in Mathematics & Statisticsbook series (PROMS, volume 211)","Springer International Publishing","Vol. 211",,"pp. 253--273",2018,Mar.