@article{EUG_1989__21_a5,
     author = {Andreas Petrakis},
     title = {The {Torsion} {Tensor} on {Manifolds} with {r-Tangent} {Structure}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}
},
     pages = {59-66},
     publisher = {mathdoc},
     volume = {21},
     year = {1989},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1989__21_a5/}
}