"The Use of Anaerobic Digestion Process in the Treatment of Dairy Wastewater by Microorganisms Derived from Sewage Wasted Sludge". مجلة الهندسة والتنمية المستدامة, م 16, عدد 4, ديسمبر، 2012, ص 181-94, https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1234.