4)\tHomma M. 1971. Trypsin action on the growth of Sendai virus in tissue culture cells. I. Restoration of the infectivity for L cells by direct action of tyrpsin on L cell-borne Sendai virus. J Virol 8:619-29.\n
5)\tHomma M. 1972. Trypsin action on the growth of Sendai virus in tissue culture cells. II. Restoration of the hemolytic activity if L cell-borne Sendai virus by trypsin. J Virol 9:829-35.\n