Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) E GAMS and H SCHAD and W HEIMISCH and S HAGL and N MENDLER and F SEBENING,Preservation versus severance of the subvalvular apparatus in mitral valve replacement: an experimental study,European Journal of Cardio-Thoracic Surgery,1010-7940,Oxford University Press (OUP),1990,4,5,250-256,https://cir.nii.ac.jp/crid/1362825893672044032,https://doi.org/10.1016/1010-7940(90)90248-x