1. Adams, M. H. (1959). Bacteriophages. — New York & London, Int. Publ., xviii+592 p.
2. Barricelli, N. (1947). The hypothesis of the gene-symbiosis and its importance in the explanation of the origin of the gamic reproduction. — Oslo, Cammermeyers Boghandel, 9 p.
3. — (1952). Mikroorganismenes genetikk. — Naturen 1952, Nr. 6, p. 162–191.
4. - (1954). Esempi numerici di processi di evoluzione. — Methodos 1954, p. 45–68.
5. — (1955). On the manner in which crossbreeding takes place in bacteriophages and bacteria. — Acta biotheor., Leiden XI, p. 75–84.