His The origin of life.

Encyc. Brit., 15th ed.: v. 7, p. 545 (Oparin, Aleksandr Ivanovich, b. 3-3-1894, d. 4-21-1980; biochemist)

Enc. Amer., v. 17, p. 421 (Aleksandr Ivanovich Oparin)

Collier's, v. 4, p. 183 (A. I. Oparin)

LCCN 64-16096: His The chemical origin of life, 1964 (hdg.: Oparin, Aleksandr Ivanovich, 1894-1980; usage: Alexander I. Oparin)

Homenaje a Oparin, 1986, c1983: p. 7 (profesor Alexander Ivanovich Oparin; born and died in Moscow; b. 1894; d. 1980)

Proiskhozhdenie zhizni i ėvoli︠u︡t︠s︡ionnai︠a︡ biokhimii︠a︡, 1975: t.p. (A.И. Опарина = A.I. Oparina) p. facing t.p. (Aлександр Иванович Опарин = Aleksandr Ivanovich Oparin)

LC database, Oct. 6, 2016: (usage: A.I. Oparin (14 times), A. Oparin (4 times), Alexander Oparin (once))

Ḥayāt, [1973 or 1974]: t.p. (آ.اى. اپارين = Ā.Ī. Upārīn)