@article{10_4064_cm133_2_1,
     author = {Piotr Graczyk and Patrice Sawyer},
     title = {On the product formula on
 noncompact {Grassmannians}},
     journal = {Colloquium Mathematicum},
     pages = {145--167},
     publisher = {mathdoc},
     volume = {133},
     number = {2},
     year = {2013},
     doi = {10.4064/cm133-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm133-2-1/}
}