Showalter HD, Johnson JL, Werbel LM, Leopold WR, Jackson RC, Elslager EF (1984). "5-[(Aminoalkyl)amino]-substituted anthra[1,9-cd]pyrazol-6(2H)-ones as novel anticancer agents. Synthesis and biological evaluation". J. Med. Chem. 27 (3): 253–5. doi:10.1021/jm00369a002. PMID6699870.
Showalter HD, Johnson JL, Werbel LM, Leopold WR, Jackson RC, Elslager EF (1984). "5-[(Aminoalkyl)amino]-substituted anthra[1,9-cd]pyrazol-6(2H)-ones as novel anticancer agents. Synthesis and biological evaluation". J. Med. Chem. 27 (3): 253–5. doi:10.1021/jm00369a002. PMID6699870.