Variation of constants formulae for difference equations with advanced arguments. Díaz, Lolimar; Naulin, Raúl — 2000 International Journal of Mathematics and Mathematical Sciences
Φ -bounded solutions to nonlinear difference equations with advanced arguments. Díaz, Lolimar; Naulin, Raúl — 2002 Divulgaciones Matemáticas
A proof of the Schauder-Tychonoff theorem. Díaz, Lolimar; Naulin, Raúl — 2006 Divulgaciones Matemáticas