JANUŠAUSKAITĖ, Nijolė. The combinatorial problem in optimal control for the discrete systems . Lietuvos matematikos rinkinys, [S. l.], v. 37, n. I, p. 277–280 , 1997. DOI: 10.15388/LMD.1997.38239. Disponível em: https://journals.vu.lt./LMR/article/view/38239. Acesso em: 19 apr. 2025.