PubMed=3140712
Masayoshi Namba, Koji Nishitani, Fujiko Fukushima, Tetsuo Kimoto;
Multistep carcinogenesis of normal human fibroblasts. Human fibroblasts immortalized by repeated treatment with Co-60 gamma rays were transformed into tumorigenic cells with Ha-ras oncogenes.
Anticancer Res. 8:947-958(1988)

PubMed=8744932; DOI=10.18926/AMO/30489
Mikio Iijima, Yoshio Kano, Tsutomu Nohno, Masayoshi Namba;
Cloning of cDNA with possible transcription factor activity at the G1-S phase transition in human fibroblast cell lines.
Acta Med. Okayama 50:73-77(1996)

PubMed=8790940; DOI=10.1247/csf.21.111
Koichiro Mihara, Mikio Iijima, Tadashi Kondo, Masayoshi Namba;
Selective expression of mutated p53 in human cells immortalized with either 4-nitroquinoline 1-oxide or 60Co gamma rays.
Cell Struct. Funct. 21:111-116(1996)