T. Sawik , B. (2006). Записки Горного института, 167(2), 306-308. извлечено от https://pmi.spmi.ru/pmi/article/view/8033

T. Sawik , B. (2006). The modification of Markowitz portfolios made for stocks from the warsaw stock exchange. Journal of Mining Institute, 167(2), 306-308. Retrieved from https://pmi.spmi.ru/pmi/article/view/8033