¹⁴⁵ Infant sleep and night feeding patterns during later infancy: association with breastfeeding frequency, daytime complementary food intake, and infant weight: https://www.ncbi.nlm.nih.gov/pubmed/25973527
¹⁵⁰ Developmental readiness of normal full term infants to progress from exclusive breastfeeding to the introduction of complementary foods: http://pdf.usaid.gov/pdf_docs/Pnacs461.pdf