Bosch, M., J. Figuerola, F. J. Cantos, and R. Velarde. “Intracolonial Differences in the Infestation by Haemaproteus Lari on Yellow-Legged Gulls Larus Cachinnans”. Ornis Fennica, vol. 74, no. 2, July 1997, pp. 105–112, https://ornisfennica.journal.fi/article/view/133463.