Test of QED to fourth order by study of four-lepton final states in e+e- interactions at 29 GeV with the Mark II detector. - Petradza M; Thun R; Abrams G; Amidei D; Baden AR; Barklow T; Boyarski A; Boyer J; Burchat PR; Burke DL; Butler F; Dorfan JM; et al. (Physical review. D, Particles and fields, 1990)