Perrin, R. 1980 Contribution à la connaissance de l'étiologie de la maladie de l'écorce du hêtre. II. Étude expérimentale de l'association Cryptococcus fagisuga lind-Nectria coccinea (Pers ex Fries) Fries, Rôle respectif des deux organismes.. Annales des Sciences Forestières 37: 319-331.

Notes: Title in English: [Contribution to knowledge of beech bark disease etiology. II. Experimental study of Cryptococcus fagisuga Lind Nectria coccinea (Pers. ex Fries) Fries association. Respective part of each organism.] Previous French studies have placed Nectria coccinea in a prominent position in mycoflora associated with beech bark necrosis after Cryptococcus fagisuga pulluations.