@article{10_4153_CMB_1985_045_5,
     author = {Coxeter, H. S. M.},
     title = {The {Simplicial} {Helix} and the {Equation} tan n\ensuremath{\theta} = n tan \ensuremath{\theta}},
     journal = {Canadian mathematical bulletin},
     pages = {385--393},
     year = {1985},
     volume = {28},
     number = {4},
     doi = {10.4153/CMB-1985-045-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1985-045-5/}
}