@article{10_4064_sm_44_4_359_364,
     author = {Miguel de Guzm\'an},
     title = {On the derivation and covering properties of a differentiation basis},
     journal = {Studia Mathematica},
     pages = {359--364},
     publisher = {mathdoc},
     volume = {44},
     number = {4},
     year = {1972},
     doi = {10.4064/sm-44-4-359-364},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-44-4-359-364/}
}