L. I. PETROVA. Nonidentical Relations of Skew-Symmetric Forms: Generation of Closed Exterior Forms. Discrete Transitions. Connection between Field-theory Equations and Nonidentical Relations. Current Topics on Mathematics and Computer Science Vol. 7, [S. l.], p. 150–166, 2021. DOI: 10.9734/bpi/ctmcs/v7/3369F. Disponível em: https://stm.bookpi.org/CTMCS-V7/article/view/2946. Acesso em: 13 jun. 2026.