Geidel, S., M. Lass, and J. Ostermeyer. “Seven-Year Experience With Ablation of Permanent Atrial Fibrillation Concomitant to Mitral Valve Surgery in 152 Patients”. The Heart Surgery Forum, vol. 11, no. 3, June 2008, pp. E175-E180, doi:10.1532/HSF98.20081027.