ŠTIKONAS, Artūras. The root condition for polynomial of the second degree and a spectral analysis for three-level finite-difference schemes. Lietuvos matematikos rinkinys, [S. l.], v. 38, n. II, p. 396–401 , 1998. DOI: 10.15388/LMD.1998.37944. Disponível em: https://www.zurnalai.vu.lt/LMR/article/view/37944. Acesso em: 7 nov. 2025.