@article{701397,
     title = {The integral cohomology rings of real infinite-dimensional flag manifolds},
     booktitle = {Proceedings of the Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1985},
     pages = {[157]-164},
     mrnumber = {MR0853138},
     zbl = {0591.55007},
     url = {http://dml.mathdoc.fr/item/701397}
}

Markl, Martin. The integral cohomology rings of real infinite-dimensional flag manifolds, dans Proceedings of the Winter School "Geometry and Physics", GDML_Books,  (1985), pp. [157]-164. http://gdmltest.u-ga.fr/item/701397/