CRIVOI, Dumitru. 2014. “About Natural Bodies Univers”. Anuarul Universitatii "Petre Andrei" Din Iasi - Fascicula: Drept, Stiinte Economice, Stiinte Politice 14 (December):9-27. https://www.lumenpublishing.com/journals/index.php/upa-sw/article/view/711.