The Kaldor-Kalecki business cycle model. - Adam Krawiec; Marek Szydlowski (Ann. Oper. Res., 1999)

Scientific cycle model with delay. - Marek Szydlowski; Adam Krawiec (Scientometrics, 2001)

Growth cycles of knowledge. - Marek Szydlowski; Adam Krawiec (Scientometrics, 2009)

Viscous Matter in FRW Cosmology. - Marek Szydlowski; Adam Krawiec (Symmetry, 2020)