Navarro-Bravo, B., Párraga-Martínez, I., López-Torres Hidalgo, J., Andrés-Pretel, F., & Rabanales-Sotos, J. (2014). Group cognitive-behavioral therapy for insomnia: a meta-analysis. Anales De Psicología / Annals of Psychology, 31(1), 8-18. https://doi.org/10.6018/analesps.31.1.168641