Zhang, Y; Proenca, R; Maffei, M; Barone, M; Leopold, L; Friedman, JM (Dec 1, 1994). "Positional cloning of the mouse obese gene and its human homologue". Nature (Research Support). 372 (6505): 425–32. Bibcode:1994Natur.372..425Z. doi:10.1038/372425a0. PMID7984236. S2CID4359725.
Zhang, Y; Proenca, R; Maffei, M; Barone, M; Leopold, L; Friedman, JM (Dec 1, 1994). "Positional cloning of the mouse obese gene and its human homologue". Nature (Research Support). 372 (6505): 425–32. Bibcode:1994Natur.372..425Z. doi:10.1038/372425a0. PMID7984236. S2CID4359725.
Zhang, Y; Proenca, R; Maffei, M; Barone, M; Leopold, L; Friedman, JM (Dec 1, 1994). "Positional cloning of the mouse obese gene and its human homologue". Nature (Research Support). 372 (6505): 425–32. Bibcode:1994Natur.372..425Z. doi:10.1038/372425a0. PMID7984236. S2CID4359725.
"In the bacteriology of the 1920s, the conversion of the R to the S form could be regarded as an adaptation to the environment. However, the transformation of Type I to Type II was the equivalent of the transformation of one species into another, a phenomenon never before observed. Avery was initially skeptical of Griffith's findings and for some time refused to accept the validity of his claims, believing that they were the result of inadequate experimental controls. Avery's research on therapeutic sera led him to conclude that pneumococcal types were fixed and that specific therapeutic agents could thus be developed to combat the various types. A transformation from type to type in vivo presented a disturbing clinical picture, as well as a challenge to the theoretical formulations of contemporary bacteriology" [Oswald T Avery Collection, "Shifting focus: Early work on bacterial transformation, 1928-1940", Profiles in Science, US National Library of Medicine, Web: 24 Jan 2013].
Dubos, René, "Memories of working in Oswald Avery's laboratory", Symposium Celebrating the Thirty-Fifth Anniversary of the Publication of "Studies on the chemical nature of the substance inducing transformation of pneumococcal types", 2 Feb 1979
Zhang, Y; Proenca, R; Maffei, M; Barone, M; Leopold, L; Friedman, JM (Dec 1, 1994). "Positional cloning of the mouse obese gene and its human homologue". Nature (Research Support). 372 (6505): 425–32. Bibcode:1994Natur.372..425Z. doi:10.1038/372425a0. PMID7984236. S2CID4359725.