“…In this paper, the formulated models include damping of the portal structure. Including selected references on the crane modelling and dynamics (Gustafsson, 1996;Maczyński and Szczotka, 2002), which were considered in Vasiljević et al (2016), in this paper additional references on the effect of structure damping (Chopra, 2006;Spyrakos, 1994;Bathe, 1996) and on the dynamic stability of cranes (Ito et al, 1985;Towarek, 1998;Ju et al, 2006;Shaikh and Kumar, 2016) are considered.…”