Duration of action of abobotulinumtoxina and onabotulinumtoxina: a randomized, double-blind study using a contralateral frontalis model
The Journal of Clinical and Aesthetic Dermatology
https://europepmc.org/article/MED/21938269
https://www.ncbi.nlm.nih.gov/pubmed/21938269
https://bibgraph.hpcr.jp/abst/pubmed/21938269

[Duration of action of abobotulinumtoxina and onabotulinumtoxina: a randomized, double-blind study using a contralateral frontalis model]

Please refer to the paper of Janus.