Sadeghi S, Rafat S A, Ghaderi Zefrei M, Khaligh F, Rostami K H, Bohlouli M, Bahrani Behzadi M R and Mohaghegh M 2013:
Factors affecting external and internal mammary morphology traits and assessment of their interrelationships with milk yield in Lori Bakhtiari breed ewes.
Livestock Research for Rural Development. Volume 25, Article #37.
, from http://www.lrrd.org/lrrd25/3/sade25037.htm