1. Adams D., & Hewell S. (1997). Maternal and professional assessment of breastfeeding. Journal of human lactation, 13, 279-283.
2. Baumgarder D.J., Muehl P., Fischer M., & Pribbenow B. (2003). Effect of labor epidural anesthesia on breast-feeding of healthy full-term newborns delivered vaginally. The Journal of the American Board of Family Practice, 16, 7-13.
3. Carfoot S., Williamson P., & Dickson R. (2007). A randomised controlled trial in the north of England examining the effects of skin-to-skin care on breast feeding. Journal of midwifery & women's health, 52, 116-125.
4. Crowell M.K., Hill P.D., & Humenick S.S. (1994). Relationship between obstetric analgesia and time of effective breast feeding. Journal of nurse-midwifery, 39, 150-156.