My midwife referred me to the following articles when we were thinking about whether to do oral or injection Vitamin K.
Following are links to research on the benefits and risks of administering vitamin K:
Tandoi et al, "Vitamin K prophylaxis: Leaving the old route for the new one?" in Acta Pædiatrica, 2005; 94 (Suppl 449): 125–128.
Thomas & Gebara, "Difficulty Breathing" in Clinical Pediatrics, June 2004; 43:499-502
Hansen et al, "Weekly oral vitamin K prophylaxis in Denmark" in Acta Pædiatrica, 2003; 92: 802–805.
Enoch, Jennifer, "Babies and Vitamin K" in Midwifery Today, Issue 56, Winter 2000.
"Controversies Concerning Vitamin K and the Newborn" in Journal of the American Academy of Pediatrics, Vol. 112 No. 1 July 2003, pp. 191-192.
"Vitamin K for Your Baby" in Midirs in collaboration with the Centre for Reviews and Dissemination
Is it okay for me to share these links? If not, moderators, feel free to remove.