Rayes, N., Hansen, S., Seehofer, D., Müller, A. R., Serke, S., Bengmark, S., & Neuhaus, P. (2002). Early enteral supply of fiber and Lactobacilli versus conventional nutrition: A controlled trial in patients with major abdominal surgery. Nutrition, 18(7), 609-615. https://doi.org/10.1016/S0899-9007(02)00811-0

Rayes, Nada, Sonja Hansen, Daniel Seehofer, Andrea Raffaela Müller, Stefan Serke, Stig Bengmark, and Peter Neuhaus. "Early Enteral Supply of Fiber and Lactobacilli Versus Conventional Nutrition: A Controlled Trial in Patients with Major Abdominal Surgery." Nutrition 18, no. 7 (2002): 609-615. https://doi.org/10.1016/S0899-9007(02)00811-0.

Rayes, Nada, et al. "Early Enteral Supply of Fiber and Lactobacilli Versus Conventional Nutrition: A Controlled Trial in Patients with Major Abdominal Surgery." Nutrition, vol. 18, no. 7, 2002, pp. 609-615, https://doi.org/10.1016/S0899-9007(02)00811-0.