ELIWA, S. PLANETARY NEBULAE: NGC 1514 – NGC 40. Emerging Minds Journal for Student Research, [S. l.], v. 1, p. 101–108, 2023. DOI: 10.59973/emjsr.15. Disponível em: https://ipipublishing.org/index.php/emjsr/article/view/15. Acesso em: 19 may. 2024.