@article{RCM_1971__5_181588,
     author = {Nelo D. Allan},
     title = {Maximal open compact subgroups of the projective symplectic group over a locally compact discrete valuation field},
     journal = {Revista colombiana de matematicas},
     pages = {31--58},
     publisher = {mathdoc},
     volume = {5},
     year = {1971},
     zbl = {0271.20021},
     url = {http://geodesic.mathdoc.fr/item/RCM_1971__5_181588/}
}