Metelka, Josef:
Sur les variétés de base simples des transformations de Cremona.
(French) [On simple manifolds of a base in Cremona transformations].Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica-Physica-Chemica,
vol. 2
(1961),
issue 1,
pp. 5-32