VASILYEV, Alexander V.; VASILYEV, Vladimir B. Difference Equations in a Multidimensional Space. Mathematical Modelling and Analysis, [S. l.], v. 21, n. 3, p. 336–349, 2016. DOI: 10.3846/13926292.2016.1161668. Disponível em: https://transport.vilniustech.lt/index.php/MMA/article/view/817. Acesso em: 14 aug. 2025.