@article{10_4064_sm_53_3_265_267,
     author = {T. Pytlik},
     title = {On commutative approximate identities},
     journal = {Studia Mathematica},
     pages = {265--267},
     publisher = {mathdoc},
     volume = {53},
     number = {3},
     year = {1975},
     doi = {10.4064/sm-53-3-265-267},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-53-3-265-267/}
}