PALUŠ, Hubert - SLAŠŤANOVÁ, Nikola. The role of environmentally preferable purchasing for the improvement of companies' competitiveness. In Globalization and its socio-economic consequences : proceedings [elektronický zdroj]. - Žilina : University of Žilina, 2022. ISBN 978-80-8154-332-6, p. 1079-1086 [online]. VEGA 1/0494/22 ; VEGA 1/0495/22. Dostupné na internete: <https://globalizacia.com/wp-content/uploads/2023/02/Globalizacia_2022.pdf>