1. M. Bartušek,On the structure of solutions of a system of three differential inequalities, Arch. Math.,30 (1994), pp. 117–130.
2. M. Cecchi -M. Marini -Gabriele Villari,On a cyclic disconjugate operator associated to linear differential equations, Annali Mat. Pura Appl., IV,CLXX (1996), pp. 297–309.
3. M.Cecchi - Z.Došlá - M.Marini,Some properties of third order differential operators, Czech. Math. J. (1996).
4. M. Cecchi -Z. Došlá -M. Marini -Gabriele Villari,On the qualitative behavior of solutions of third order differential equations, J. Math. Anal. Appl,197 (1996), pp. 749–766.
5. M. Cecchi -Z. Došlá -M. Marini,Comparison theorems for third order differential equations, Proceedings of Dynamic Systems and Appl.,2 (1996), pp. 99–106.