PEKÁR, Juraj - BREZINA, Ivan - REIFF, Marian. Determining the Investors’ Strategy During the COVID-19 Crisis Based on the S&P 500 Stock Index. - Registrovaný: Web of Science. In Strategic Management : International Journal of Strategic Management and Decision Support Systems in Strategic Management. - Subotica : Faculty of Economics in Subotica University of Novi Sad, 2024. ISSN 2334-6191, 2024, vol. 29, no. 3, pp. 28-42. VEGA 1/0339/20.