From the book:
The 'Second Bulgarian Empire.' Its Origin and History to 1204
R. Wolff

"The Hungarian scholar, M. Gyóni, is at present in the midst of a series of studies submitting all the passages relative to the Vlachs in the Byzantine sources to a searching re-examination. See his 'L'Oeuvre de Kekaumenos, Source de l'histoire Rou-maine,' Revue de Vllistoire Comparée, XXIII, Nouvelle Série III (1945), 96-180. This is a French translation of his Magyar monograph, A Legrégibb Vélemény A Román Nép Eredetéröl (Budapest, 1944), pp. 87 [The Oldest Theory on the Origin of the Rumanian People]. Gyóni reproduces from Vassilievsky and Jernstedt on pp. 75-87 all the passages relating to the Vlachs, with Hungarian translation; these are omitted from the French translation."