Dag, Ahmet, Tahsin Colak, Ozgur Turkmenoglu, Ramazan Gundogdu, and Suha Aydin. 2011. “ A Randomized Controlled Trial Evaluating Early Versus Traditional Oral Feeding After Colorectal Surgery ”. Clinics 66 (12): 2001-5. https://doi.org/10.1590/S1807-59322011001200001.