Valužis, Mantas. “Present Value of Firm Asset in Case of Correlated Defaults: A Generalized Structural Approach of Credit Risk”. Lietuvos matematikos rinkinys 47, no. spec. (December 20, 2007): 74–79. Accessed May 6, 2024. https://www.journals.vu.lt/LMR/article/view/18188.