@article{PORMA_1947__6_1_114651,
     author = {Pereira Coelho, R.},
     title = {On the groups of certain linkages},
     journal = {Portugaliae mathematica},
     pages = {57--65},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1947},
     mrnumber = {0024124},
     zbl = {0035.25103},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1947__6_1_114651/}
}