@article{SIGMA_2020_16_a94,
     author = {Maung Min-Oo},
     title = {Covariant vs {Contravariant} {Methods} in {Differential} {Geometry}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2020},
     volume = {16},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2020_16_a94/}
}