Lugar de publicación The vanguard sperm cohort of the boar ejaculate is overrepresented in the tubal sperm reservoir in vivo.. 56:68-72. 2010 Selection of Boar Spermatozoa Using Centrifugation on a Glycidoxypropyltrimethoxysilane-Coated Silica Colloid. 55(5):547-552. 2009