@article{MAN_1981__255_182850,
     author = {Amir Assadi and Dan Burghelea},
     title = {Examples of {Asymmetrie} {Differentiable} {Manifolds.}},
     journal = {Mathematische Annalen},
     pages = {423--430},
     publisher = {mathdoc},
     volume = {255},
     year = {1981},
     zbl = {0437.57021},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__255_182850/}
}