J. M. Dominguez, J. E. S. Manzanero, C. A. Lontoc-Junsay, and P. P. Sangel, “Relationship of Udder Morphometric Traits to Mothering Ability of Landrace X Large White Primiparous Sows”, Trop. Anim. Sci. J., vol. 43, no. 1, pp. 11–17, Feb. 2020, doi: 10.5398/tasj.2020.43.1.11.