@book{MSMF_2007_2_108__1_0,
     author = {Gasqui, Jacques and Goldschmidt, Hubert},
     title = {Infinitesimal isospectral deformations of the {Grassmannian} of 3-planes in ${\mathbb{R}}^6$},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {108},
     year = {2007},
     doi = {10.24033/msmf.420},
     mrnumber = {2447005},
     zbl = {1152.53040},
     language = {en},
     url = {http://archive.numdam.org/item/MSMF_2007_2_108__1_0/}
}