Rutkauskas, Aleksandras Vytautas, and Donatas Valiulis. “With Double Trump Portfolio through Whirls of Financial Crisis”. Business: Theory and Practice 10, no. 4 (December 10, 2009): 259-268. Accessed March 28, 2024. https://journals.vilniustech.lt/index.php/BTP/article/view/8955.