6Myers S. Determinants of corporate borrowing. Journal of Financial Economics, 1977 ; 5 (2) : 147-175.
7Bendall H B, Stent A F. Ship investment under uncertaint : valuing a real option on the maximum of several strategies. Maritme Economics & Logistics, 2005 ;07 : 19-35.
8Bendall H B, Stent A F. Maritime investment strategies with a portfo- lio of real options. Maritime Policy&Mafangement, 2007 ; 34 ( 5 ) : 441-452.