%0 Journal Article %A A. I. Akhiezer %A V. I. Truten' %A S. P. Fomin %A N. F. Shul'ga %T The coherent effect in the electron-positron pair formation in a single crystal %J Doklady Akademii Nauk %D 1979 %P 338-341 %V 249 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1979_249_2_a19/ %G ru %F DAN_1979_249_2_a19