Existence results for nondensely defined semilinear functional differential inclusions in Fréchet spaces. Henderson, Johnny, Ouahab, Abdelghani (2005) Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Exponential formula for one-time integrated semigroups. Kalabušić, Senada, Vajzović, Fikret (2003) Novi Sad Journal of Mathematics