@article{10_4153_CMB_1979_061_6,
     author = {Putcha, Mohan S.},
     title = {Local {Unique} {Factorization} in the {Semigroup} of {Paths} in {Rn}},
     journal = {Canadian mathematical bulletin},
     pages = {471--475},
     year = {1979},
     volume = {22},
     number = {4},
     doi = {10.4153/CMB-1979-061-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1979-061-6/}
}