“Determination by HPLC-RIA of Immunoreactive Prostaglandin E2 in Blattella Germanica and Gryllus Bimaculatus”. Revista Española De Fisiología, vol. 42, no. 4, Dec. 1986, pp. 507-11, https://revistas.unav.edu/index.php/ref/article/view/46665.