Smirnova S. L. Cardioelectrical field on the body surface of newborn nestlings of the pied flycatcher (Ficedula hypoleuca) at the period of initial atrial activity / S. L. Smirnova, I. M. Roshchevskaya, M. P. Roshchevsky //Journal of Evolutionary Biochemistry and Physiology. - 2014.- Vol. 50. - P . 77–80.