%0 Journal Article
%A Cong Qin
%A Xinfu Chen
%A Xin Lai
%A Wanghui Yu
%T Regularity of free boundary arising from optimal exercise of perpetual executive stock options
%J Interfaces and free boundaries
%D 2015
%P 69-92
%V 17
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4171/ifb/334/
%R 10.4171/ifb/334
%F 10_4171_ifb_334