HAY, Julie. Obituary: Dr Roberto Kertész. International Journal of Transactional Analysis Research & Practice, [S. l.], v. 10, n. 1, p. 3, 2019. DOI: 10.29044/v10i1p3. Disponível em: https://ijtarp.org/article/view/19426. Acesso em: 12 jul. 2025.