@article{10_4064_cm128_1_1,
     author = {Carlo Alberto Mantica and Luca Guido Molinari},
     title = {Extended {Derdzi\'nski{\textendash}Shen} theorem
 for curvature tensors},
     journal = {Colloquium Mathematicum},
     pages = {1--6},
     publisher = {mathdoc},
     volume = {128},
     number = {1},
     year = {2012},
     doi = {10.4064/cm128-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm128-1-1/}
}