Characteristics of serology-based vaccine potency models for foot-and-mouth disease virus., Willems, Tom, Lefebvre David, Goris Nesya, Diev Vyacheslav I., Kremenchugskaya Svetlana R., Guntram Paul, Haas Bernd, and De Clercq Kris , Vaccine, 2012 Aug 31, Volume 30, Issue 40, p.5849-55, (2012)