Bianchetti AA, Lava SA, Bettinelli A, Rizzi M, Simonetti GD, Bianchetti MG. Preference for formulations containing calcium and vitamin D(3) in childhood: a randomized-sequence, open-label trial. Clin Ther. 2010 Jun;32(6):1083–7. doi: 10.1016/j.clinthera.2010.06.006. PMID: 20637962.