FURKOVÁ, Andrea - KNÍŽAT, Peter. Portfolio Optimization Theory: Estimation of the Covariance Matrix for High-dimensional Data. In Contemporary Issues in Economy. International Conference on Applied Economics. Contemporary Issues in Economy : 12th International Conference on Applied Economics : Poland 29-30 June 2023 : Abstract Book. - Olsztyn : Instytut Badań Gospodarczych, 2023. ISBN 978-83-65605-61-0, p. 66. VEGA 1/0193/20.