C. Squillacioti, A. De Luca, S. Paino, E. Langella, and N. Mirabella, “Effects of castration on the expression of the NGF and TrkA in the vas deferens and accessory male genital glands of the rat”, Eur J Histochem, vol. 53, no. 4, p. e29, Dec. 2009.