Brinthaupt, Thomas M.; Dove, Christian T. (June 2012). «Differences in self-talk frequency as a function of age, only-child, and imaginary childhood companion status». Journal of Research in Personality46 (3): 326-333. doi:10.1016/j.jrp.2012.03.003.
Polit, D. F.; Falbo, T. (1988), «The intellectual achievement of only children», Journal of Biosocial Science20 (3): 275-285, PMID3063715, doi:10.1017/S0021932000006611..
Downey, D. B. (2001), «Number of siblings and intellectual development: The resource dilution explanation», American Psychologist56 (6–7): 497-504, PMID11413873, doi:10.1037/0003-066X.56.6-7.497..
Zajonc, R. B.; Markus, Gregory B. (1975), «Birth Order and Intellectual Development», Psychological Review82 (1): 74-88, doi:10.1037/h0076229..
Falbo, Toni (1978), «Sibling Tutoring and Other Explanations for Intelligence Discontinuities of Only and Last Borns», Journal of Population1 (4): 349-363, doi:10.1007/BF00972557..
Polit, D. F.; Falbo, T. (1988), «The intellectual achievement of only children», Journal of Biosocial Science20 (3): 275-285, PMID3063715, doi:10.1017/S0021932000006611..
Downey, D. B. (2001), «Number of siblings and intellectual development: The resource dilution explanation», American Psychologist56 (6–7): 497-504, PMID11413873, doi:10.1037/0003-066X.56.6-7.497..
nymag.com
Grigoriadis, Vanessa (29 de octubre de 2004). «Only Children in New York». New York Magazine(en inglés estadounidense). Consultado el 1 de agosto de 2023.