@article{10_4064_fm202_3_2,
     author = {H. A. Dye},
     title = {Pure virtual braids homotopic to the identity braid},
     journal = {Fundamenta Mathematicae},
     pages = {225--239},
     publisher = {mathdoc},
     volume = {202},
     number = {3},
     year = {2009},
     doi = {10.4064/fm202-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm202-3-2/}
}