@article{10_4153_CMB_1981_023_6,
     author = {Gupta, Narain},
     title = {A {Problem} of {R.} {H.} {Fox}},
     journal = {Canadian mathematical bulletin},
     pages = {129--136},
     year = {1981},
     volume = {24},
     number = {2},
     doi = {10.4153/CMB-1981-023-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1981-023-6/}
}