KAISER, P. Pflegefamilien im Netzwerk der Systeme: Foster families in the network of systems . Journal of Family Research, [S. l.], v. 5, n. 1, p. p. 5–41, 1993. Disponível em: https://ubp.uni-bamberg.de/jfr/index.php/jfr/article/view/587. Acesso em: 25 apr. 2024.