Stewart J., Mercadante V., Dias N., Stella S., Cunha L., Canisso I., and Lima F. “Nerve Growth Factor β Increases Small Luteal Cell Number and Enhances Steroidogenic Activity in Bovine Corpus Luteum”. Clinical Theriogenology, vol. 11, no. 3, Sept. 2019, p. 445, https://clinicaltheriogenology.net/index.php/CT/article/view/10212.