  We have studied an effect of uniaxial strain to the temperature of
Bose-Einstein condensation of intersite bipolarons within the framework of
Extended Holstein-Hubbard model. Uniaxial lattice strains are taken into an
account by introducing a generalized density-displacement type force for
electron-lattice interaction. Associating the superconducting critical
temperature $T_c$ with the temperature of Bose-Einstein condensation $T_{BEC}$
of intersite bipolarons we have calculated strain derivatives of $T_{BEC}$ and
satisfactorily explained the results of the experiments on La-based high-$T_c$
films.
