1. Varietes feuilletees;Haefliger;Annls Éc. norm. sup., Pise,1962
2. S.P. Novikov: Topology of foliations, Trudȳ mosk.mat.Obshch. 14,no. 513.83.
3. Actions of Rn on manifolds;Rosenberg;Comment. math. helvet.,1966
4. H. Rosenberg: Transversal foliations; to appear.
5. Foliations and pseudogroups;Sacksteder;Am. J. Math.,1965