“…This variant of the shell and plate theories based on the direct approach is developed and continued, for example, in [75,80,81,236,237,285,286,[327][328][329][330]. It must be noted that this variant is very similar to the one presented within the general nonlinear theory of shells discussed in the monographs of Libai and Simmonds [183], and Chróścielewski et al [44], see also [41][42][43][76][77][78]162,182,189,[191][192][193]243,247,248,288,289]. The two-dimensional equilibrium equations given in [44,183,243] one gets by the exact integration over the thickness of the equations of motion of a shell-like body.…”