It is important to properly and appropriately cite references in scientific research papers in order to acknowledge your sources and give credit where credit is due. Science moves forward only by building upon the work of others. There are, however, other reasons for citing references in scientific research papers. Citations to appropriate sources show that you've done your homework and are aware of the background and context into which your work fits, and they help lend validity to your arguments.
Older baby bunnies who are found outside of the nest may not be orphaned or in need of assistance. This is most often the case. Baby cottontails are born without fur but develop a full coat in a week. Their eyes open in 10 days, and in three to four weeks they are weaned.
(depending on bunny..may be much LESS if smaller rabbit!) Newborn babies (if eyes closed) all need to be stimulated to urinate and defecate prior to or following feeding until their eyes open. (Except Jackrabbits do not). *See how to below. 2-3 weeks: 7-13 cc/ml each feeding (two feedings). Domestic eyes open at about 10 days of age.