@article{10_4064_cm_41_1_123_132,
     author = {Timothy Rouch},
     title = {Some sufficient conditions for regular approximate differentiability},
     journal = {Colloquium Mathematicum},
     pages = {123--132},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1979},
     doi = {10.4064/cm-41-1-123-132},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-41-1-123-132/}
}