Investigation of the π+→e++νe+e++e- decay Korenchenko, S. M. ; Kostin, B. F. ; Mitsel'Makher, G. V. ; Nekrasov, K. G. ; Smirnov, V. S. Abstract Publication: Soviet Journal of Experimental and Theoretical Physics Pub Date: July 1976 Bibcode: 1976JETP...44...35K