Authors: H P Wolff; C Barth; G Biro; A Bohle; G Dhom; A Distler; A Helber; H Liebau; I Purjesz; S Roscher; J Schürholz; P Vecsei; K F Weinges Journal: Klin Wochenschr Date: 1968-04-01
Authors: J B Ferriss; J J Brown; R Fraser; E Haywood; D L Davies; A W Kay; A F Lever; J I Robertson; K Owen; W S Peart Journal: Br Med J Date: 1975-01-18
Authors: T Lüscher; W Tenschert; A Salvetti; R Pedrinelli; R Maurer; F Turini; G Maltinti; H Vetter; W Vetter Journal: Klin Wochenschr Date: 1984-05-15