Vadim Zavalishim, "The Art of VA Filter Design"
David T. Yeh, Julius O. Smith III, "Discretization of the '59 Fender Bassman Tone Stack"
Julia Parker and Stefano D'Angelo, "A Digital Model of the Buchla Low-Pass Gate"
Kurt James Werner, Jonathan S. Abel, Julius O. Smith III, "A Physically Informed, Circuit-Bendable, Digital Model of the Roland TR-808 Bass Drum Circuit"
David T. Yeh, "Tutorial on Wave Digital Filters"