KULMAN, D. Georgeoff, Peter John: The Social Education of Bulgarian Youth. Südost-Forschungen, [S. l.], v. 1, n. 1, p. 483–484, 2021. Disponível em: http://bsb0sit-zepweb01.bsb.lrz.de/portal/index.php/sof/article/view/11380. Acesso em: 12 mai. 2024.