Luca Dalle Carbonare 1,*, Maria Teresa Valenti 1, Francesco del Forno 1, Elena Caneva 2and Angelo Pietrobelli Vitamin D: Daily vs. Monthly Use in Children and Elderly – What Is Going On? Nutrients 2017, 9, 652; doi:10.3390/nu9070652 // Источник: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5537772/pdf/nutrients-09-00652.pdf
