Sources
- Hunziker, U. A. and Barr, R, G. (1986). Increased carrying reduces infant crying: a randomized controlled trial. Pediatrics, 77, 641-8.
- Sears, William, M.D. and Sears, Martha, R.N.. The Baby Book. Little, Brown and Company, 2003.
- Barr, R. G. (1990). The Early Crying Paradox: A Modest Proposal. Human Nature, 1, 355-389.
- Anisfeld, E., Casper, V., Nozyce, M. and Cunningham, N. (1990). Does infant carrying promote attachment? An experimental study of the effects of increased physical contact on the development of attachment. Child Development, 61, 1617-1627.