@article{MS2_1973__33_166330,
     author = {H.C. Hansen},
     title = {On {Cycles} in {Flag} {Manifolds.}},
     journal = {Mathematica Scandinavica},
     pages = {269--274},
     publisher = {mathdoc},
     volume = {33},
     year = {1973},
     zbl = {0301.14019},
     url = {http://geodesic.mathdoc.fr/item/MS2_1973__33_166330/}
}