CZAJKOWSKI, Tomasz; SZYMAŃSKI, Grzegorz. Comparative Analysis Of The Utilisation Of Electronic Commerce And Business In Polish E-shops In The Years 2009-2011. Comparative Economic Research. Central and Eastern Europe, [S. l.], v. 16, n. 4, p. 175–201, 2014. DOI: 10.2478/cer-2013-0033. Disponível em: https://czasopisma.uni.lodz.pl/CER/article/view/6901. Acesso em: 6 dec. 2025.