لغز تنفس في جميع أنحاء العالم michel falk bølling غلاف عادي عد وحدة
Abrupt shifts of productivity and sea ice regimes at the western Barents Sea slope from the Last Glacial Maximum to the Bølling-Allerød interstadial - ScienceDirect
Prognostic impact of MitraClip in patients with left ventricular dysfunction and functional mitral valve regurgitation: A comprehensive meta-analysis of RCTs and adjusted observational studies - International Journal of Cardiology