Arch Biochem Biophys 161:76;1974; Biochem Pharmacol 26:81;1977; Biochemistry 17(5):784;1978; Cancer 40(5)Suppl:2640;1977; Cancer Chemother Pharmacol 1979;3(3):135; Cancer Chemother Pharmacol 2(3):183;1979; Cancer Res 1979;39(10):3992; Cancer Res 1980;40(1):86; Cancer Res 36:2720;1976; Cancer Res 37(9):3080;1977; Cancer Res 38(11):3745;1978; Cancer Res 38:371;1978; Cancer Res 39(8):3089;1979; Cancer Trat Rep 1979;63(8):1291; Cancer Treat Rep 1979;63(11-12):1909; Cancer Treat Rep 62(10):1503;1978; Cancer Treat Rep 63(5):775;1979; Cancer Treat Rep 63(6):1095;1979; Cell 9(4):541;1976; Experientia 33(4):428;1977