Lowenfeld, Margaret Frances; Widdows, Sibyl Taite; Gregory, Hazel H. Chodak (1996). "Percentage of Fat in Human Milk: Influence of the Method of Extraction". Journal of Human Lactation. 12 (1): 61–63. doi:10.1177/089033449601200115. PMID8715243. S2CID145352973.
Lowenfeld, Margaret Frances; Widdows, Sibyl Taite; Gregory, Hazel H. Chodak (1996). "Percentage of Fat in Human Milk: Influence of the Method of Extraction". Journal of Human Lactation. 12 (1): 61–63. doi:10.1177/089033449601200115. PMID8715243. S2CID145352973.
Lowenfeld, Margaret Frances; Widdows, Sibyl Taite; Gregory, Hazel H. Chodak (1996). "Percentage of Fat in Human Milk: Influence of the Method of Extraction". Journal of Human Lactation. 12 (1): 61–63. doi:10.1177/089033449601200115. PMID8715243. S2CID145352973.