NAFTALEWITSCH, A. Erweiterung eines Jacobischen Satzes. Lithuanian Mathematical Journal, [S. l.], v. 9, n. 4, p. 775–789, 1969. DOI: 10.15388/LMJ.1969.20819. Disponível em: https://www.journals.vu.lt/LMJ/article/view/20819.. Acesso em: 6 may. 2024.