TY JOUR TI Dynamics of internal gravity waves in the ocean with shear flows KW Internal gravity waves KW stratified ocean KW shear flows KW asymptotics KW modified Bessel function KW dispersion relations JO Russian Journal of Earth Sciences AU Bulatov, V.V. AU Vladimirov, Y.V. PY 2020 IS 20 PB Geophysical Center of the Russian Academy of Sciences