Rudiger, A., F. Businger, M. Streit, E. R. Schmid, M. Maggiorini, and F. Follath. “Presentation and Outcome of Critically Ill Medical and Cardiac-Surgery Patients With Acute Heart Failure”. Swiss Medical Weekly, vol. 139, no. 0708, Feb. 2009, pp. 110-, doi:10.4414/smw.2009.12446.