KILAR, W. Spatial concentration of world IT companies. Studies of the Industrial Geography Commission of the Polish Geographical Society, [S. l.], v. 12, p. 97–108, 2009. DOI: 10.24917/20801653.12.8. Disponível em: https://prace-kgp.uken.krakow.pl/article/view/495. Acesso em: 3 may. 2024.