Wilbring, M., U. Kappert, D. Daubner, K. Matschke, and S. M. Tugtekin. “Metastasizing Primary Atrial Leiomyosarcoma Causing a Functional High-Grade Mitral Stenosis”. The Heart Surgery Forum, vol. 15, no. 2, Apr. 2012, pp. E108-E110, doi:10.1532/HSF98.20111147.