Świadek A, Szopik-Depczyńska K. Economic Cycle and Innovative Activity of Enterprises in Polish Regions — Probit Models. br [Internet]. 2011 Nov. 9 [cited 2024 Nov. 8];(3 (25):95-104. Available from: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/1326