• Methane potential of sterilized solid slaughterhouse wastesPitk, Peep; Kaparaju, Prasad; Vilu, RaivoBioresource technology2012 / p. 42-46 : ill https://www.sciencedirect.com/science/article/pii/S0960852412006438
• Methane potential of sterilized solid slaughterhouse wastesPitk, Peep; Kõrgmaa, Vallo; Vilu, Raivo8th IWA International Symposium on Waste Management Problems in Agroindustries : Çeşme, Turkey2011 https://www.sciencedirect.com/science/article/pii/S0960852412006438