Penteriani V., Delgado M.M., Pérez-García J.M., Botella F., García S., Sanchez Zapata J.A., León Ortega M., Martínez J.E., Calvo J.F., Ortego J., Penteriani G., Melletti M., Krugersberg I. and Mora O. 2010

Sex allocation from an owl perspective: clutch order could determine brood sex to reduce sibling aggression. Ornis Fennica.