%A S. V. Gryshchuk %J Recherches sur les d?eformations %T On some cases of plane orthotropy %X There are considered some cases of plane orthotropy in the absence of body forces. Then every function from a pair-solution of the equilibrium system of equations with respect to displacements satisfies the elliptic fouth-order equation of the type: ? ? %N 2 %K the generalized Hook?s law, a plane orthotropy, the equilibrium system %P 71-76 %V LXVIII %D 2018 %L zu228475