Jensen T, Schou S, Stavropoulos A, Terheyden H, Holmstrup P. Maxillary sinus floor augmentation with Bio-Oss or Bio-Oss mixed with autogenous bone as graft in animals: a systematic review. International Journal of Oral and Maxillofacial Surgery. 2012;41(1):114-20. doi: 10.1016/j.ijom.2011.08.010