DRÁBEKOVÁ, Janka - SPIŠŠÁKOVÁ, Adriána. Consumers, cafes, baristas, and statistical analysis of their interactions. In Mathematics in education, research and applications online. ISSN 2453-6881, 2023, vol. 9, no. 1, s. 1-8. Dostupné na internete:<https://doi.org/10.15414/meraa.2023.09.01.1-8>