Zakonnik Łukasz. Price formation of autographs of famous persons at stationary and online auctions in Poland before, during and after the Covid19 pandemic - influence of selected factors. ASEJ [Internet]. 2024 Mar. 30 [cited 2024 Jun. 17];28(1):43-54. Available from: https://asej.eu/index.php/asej/article/view/770