@article{zu228475,
          volume = {LXVIII},
          number = {2},
           title = {On some cases of plane orthotropy},
          author = {S. V. Gryshchuk},
            year = {2018},
           pages = {71--76},
         journal = {Recherches sur les d?eformations},
        keywords = {the generalized Hook?s law, a plane orthotropy, the equilibrium
system},
             url = {http://eprints.zu.edu.ua/28475/},
        abstract = {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:
?
?}
}