HORBATENKO, Ya. V. Kostin-type criterion for abstract linear differential equations of arbitrary order in banach spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 6, p. 860 – 864, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2918. Acesso em: 5 dec. 2025.