Quasiclassical Approximation in the Non-Relativistic and Relativistic Problems of Tunneling Ionization of a Hydrogen-Like Atom in a Uniform Electric FieldO. K. Reity, V. K. Reity and V. Yu. LazurEPJ Web of Conferences, 108 (2016) 02039DOI: https://doi.org/10.1051/epjconf/201610802039