Chris - on second thought - I have the following:
Fredeen, R.C. (1948). Cup feeding of newborn infants. Pediatrics 2:544-548
Davis, H.V. (1948). Effects of cup, bottle and breast feeding on oral
activities of newborn infants. Pediatrics 2:549-558.
Armstrong, H. (1987). Feeding low birthweight babies: advances in Kenya.
Journal of Human Lactation 3:34-37
DeCoopman, J. (1993). Breastfeeding Management for Health Care Professionals.
Chapter 5, pp.105-120. Extensive bib, pros and cons, etc.
Pat Young in SNJ, USA