S. Gevorgyan, “STUDY OF FINE PECULIARITIES OF HEAT CAPACITY IN YBa$_2$Cu$_3$O$_y$ FILMS BY MEANS OF THE LASER-COUPLED FLAT-COIL-OSCILLATOR”, Proc. YSU A: Phys. Math. Sci., vol. 45, no. 1 (224), pp. 49–54, Feb. 2011.