Simple, rapid, quantitative, syncytium forming mciroassay for the detection of human immunodeficiency virus neutralizing antibody - Nara,P.L.; Hatch,W.C.; Dunlop,N.M.; Robey,W.G.; Arthur,L.O.; Gonda,M.A.; Fischinger,P.J. (AIDS Res. Hum. Retrovir., 1987)