Transapical aortic valve implantation in 100 consecutive patients: comparison to propensity-matched conventional aortic valve replacement - Walther, Thomas; Schuler, Gerhard; Borger, Michael Andrew; Kempfert, Joerg; Seeburger, Jörg; Rückert, Yvonne; Ender, Joerg; Linke, Axel; Scholz, Markus; Falk, Volkmar; Mohr, Friedrich Wilhelm (European heart journal, 2010)