Picelli, Alessandro, Paola Bonetti, Carla Fontana, Martina Barausse, Francesca Dambruoso, Francesca Gajofatto, Stefano Tamburin, Paolo Girardi, Raffaele Gimigliano, and Nicola Smania. 2012. “Accuracy of Botulinum Toxin Type A Injection into the Gastrocnemius Muscle of Adults With Spastic Equinus: Manual Needle Placement and Electrical Stimulation Guidance Compared Using Ultrasonography”. Journal of Rehabilitation Medicine 44 (5):450-52. https://doi.org/10.2340/16501977-0970.