In the brochure “Rectilinear Biphasic Defibrillation Brochure” of the company Zoll given a link to the source:

Platia EV. “Considering the strength-duration relationship for defibrillation: Physiologic basis and clinical implications.” White Paper.

https://www.zoll.com/-/media/uploadedfiles/public_site/supporting_pages/biphasic/biphasic-lo-new-pdf

However, I could not find this White Paper. Maybe someone can give it to me? I really want to read it.