G. Novara m.fl. (2016). «Efficacy and safety of hexanic lipidosterolic extract of Serenoa repens (Permixon) in the treatment of lower urinary tract symptoms due to benign prostatic hyperplasia: systematic review and meta-analysis of randomized controlled trials». European Urology Focus. 2 (5): 553–561. ISSN2405-4569. PMID28723522. doi:10.1016/j.euf.2016.04.002.
G. Novara m.fl. (2016). «Efficacy and safety of hexanic lipidosterolic extract of Serenoa repens (Permixon) in the treatment of lower urinary tract symptoms due to benign prostatic hyperplasia: systematic review and meta-analysis of randomized controlled trials». European Urology Focus. 2 (5): 553–561. ISSN2405-4569. PMID28723522. doi:10.1016/j.euf.2016.04.002.
G. Novara m.fl. (2016). «Efficacy and safety of hexanic lipidosterolic extract of Serenoa repens (Permixon) in the treatment of lower urinary tract symptoms due to benign prostatic hyperplasia: systematic review and meta-analysis of randomized controlled trials». European Urology Focus. 2 (5): 553–561. ISSN2405-4569. PMID28723522. doi:10.1016/j.euf.2016.04.002.