EDITOR. Preface. Proceedings Series on Physical & Formal Sciences, [S. l.], v. 2, p. i-xi, 2021. DOI: 10.30595/pspfs.v2i.215. Disponível em: http://conferenceproceedings.ump.ac.id/pspfs/article/view/215. Acesso em: 6 jul. 2026.