%0 Journal Article %A A. B. Plachenov %T Acoustic, electromagnetic and elastic wavefield energy expression via its asymptotics at large times and distances %J Zapiski Nauchnykh Seminarov POMI %D 2020 %P 269-287 %V 493 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2020_493_a17/ %G ru %F ZNSL_2020_493_a17