1. Groupes de Lie et puissances réduites de Steenrod;Borel;Amer. J. Math.,1953
2. Construction and properties of some 6-dimensional almost complex manifolds;Calabi;Trans. Amer. Math. Soc.,1958
3. A class of compact, complex manifolds which are not algebraic;Calabi;Ann. of Math.,1953
4. Fibre Bundles;Husemoller,1975
5. Characteristic Classes;Milnor,1974