GRUSHKA, Ya. I. Tachyon generalization for Lorentz transforms. Methods of Functional Analysis and Topology, [S. l.], v. 19, n. 2, p. 127–145, 2013. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/541. Acesso em: 16 dec. 2025.