Antúnez, Zaira, et al. “Impact of Mental Health Problems and Social Support on Sleep Quality: Follow-up before and During the First Eight Months of the COVID-19 Pandemic in Chilean University Students”. Anales De Psicología Annals of Psychology, vol. 39, no. 2, Apr. 2023, pp. 188-96, doi:10.6018/analesps.517321.