1. Demographic parameters of the Common Crane (Grus g. grus) population wintering in Iberia;Aquila,1987
2. Alonso JA , Alonso JC , Martínez-Vicente S , Bautista LM . 1987. Simulations on a common crane (Grus grus) population model. In: Proceedings IV International Crane Workshop, pp: 277–283. Qiqihar, China. International Crane Foundation, Wisconsin, USA.
3. Alonso JC , Alonso JA , Bautista LM . 1990. Demographic model of the Common crane Grus grus in Western Europe (in Spanish). In JA Alonso JC Alonso (Eds.), distribución y demografía de la grulla común (Grus grus) en España (pp. 163–193). Madrid: ICONA - CSIC.
4. Alonso JC , Alonso JA , Onrubia A , Cruz CM , Cangarato R , Rocha P. 2016. Assessing four decades of wintering crane counts in Spain, Portugal and Morocco. In: 8th European Crane Conference, Friends of Gallocanta Association (AAG) (Ed.) pp: 28–37. Gallocanta, Spain. Friends of Gallocanta Association AAG.
5. Barzen J , Ballinger K. 2017. Sandhill and Whooping Cranes. U. S. Dept. of Agriculture: Wildlife Damage Management Technical Series 7, Retrieved from http://digitalcommons.unl.edu/nwrcwdmts/7.