Akins, C. ., Domjan, M. ., & Gutiérrez, G. . (1994). Topography of sexually conditioned behavior in male Japanese quail (Coturnix japonica) depends on the CS-US interval. Journal of Experimental Psychology. Animal Behavior Processes, 20(2), 199-209. Retrieved from http://content.apa.org/journals/xan/20/2/199

García-Manrique, P. ., Matos, M. ., Gutiérrez, G. ., Pazos, C. ., & Blanco-López, M. . Therapeutic biomaterials based on extracellular vesicles: classification of bio-engineering and mimetic preparation routes. Journal of Extracellular Vesicles, 7(1), 1422676. https://doi.org/10.1080/20013078.2017.1422676 (Original work published 2018)