Drummond, H. & C. Rodríquez (2008). "No reduction in aggression after loss of a broodmate: a test of the brood size hypothesis". Behavioral Ecology and Sociobiology. 63 (3): 321–327. doi:10.1007/s00265-008-0664-7. S2CID7726688.
Lougheed, L. W. & D. J. Anderson (1999). "Parent blue-footed boobies suppress siblicidal behavior of offspring". Behavioral Ecology and Sociobiology. 45 (1): 11–18. doi:10.1007/s002650050535. S2CID21985621.
Gonzalez-Voyer, A.; T. Szekély & H. Drummond (2007). "Why do some siblings attack each other? Comparative analysis of aggression in avian broods". Evolution. 61 (8): 1946–1955. doi:10.1111/j.1558-5646.2007.00152.x. PMID17683436. S2CID40464038.
Daly, M.; Wilson, M.; Salmon, C. A.; Hiraiwa-Hasegawa, M. & Hasegawa, T. (2001). "Siblicide and seniority". Homicide Studies. 5 (1): 30–45. doi:10.1177/1088767901005001003. S2CID59388502.
Gonzalez-Voyer, A.; T. Szekély & H. Drummond (2007). "Why do some siblings attack each other? Comparative analysis of aggression in avian broods". Evolution. 61 (8): 1946–1955. doi:10.1111/j.1558-5646.2007.00152.x. PMID17683436. S2CID40464038.
Drummond, H. & C. Rodríquez (2008). "No reduction in aggression after loss of a broodmate: a test of the brood size hypothesis". Behavioral Ecology and Sociobiology. 63 (3): 321–327. doi:10.1007/s00265-008-0664-7. S2CID7726688.
Lougheed, L. W. & D. J. Anderson (1999). "Parent blue-footed boobies suppress siblicidal behavior of offspring". Behavioral Ecology and Sociobiology. 45 (1): 11–18. doi:10.1007/s002650050535. S2CID21985621.
Gonzalez-Voyer, A.; T. Szekély & H. Drummond (2007). "Why do some siblings attack each other? Comparative analysis of aggression in avian broods". Evolution. 61 (8): 1946–1955. doi:10.1111/j.1558-5646.2007.00152.x. PMID17683436. S2CID40464038.
Daly, M.; Wilson, M.; Salmon, C. A.; Hiraiwa-Hasegawa, M. & Hasegawa, T. (2001). "Siblicide and seniority". Homicide Studies. 5 (1): 30–45. doi:10.1177/1088767901005001003. S2CID59388502.