D. Chirinos-Peinado, J. Castro-Bedriñana, P. Lara-Schwartz "Biofortification of the Ryegrass (Lolium multiflorum L.) with Chicken Manure Compost in the Central Sierra of Peru", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 1, pp. 418-423  (2020).