Some general solvability theorems. - George Isac; Cezar Avramescu (Appl. Math. Lett., 2004)

Conditional stability for a class of second-order differential equations. - Cezar Avramescu; Octavian G. Mustafa; Svitlana P. Rogovchenko; Yuri V. Rogovchenko (Appl. Math. Lett., 2005)