@article{10_4064_sm_63_3_219_228,
     author = {Chong Kim},
     title = {Restricted and unrestricted convergence of approximate identities in product spaces},
     journal = {Studia Mathematica},
     pages = {219--228},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1978},
     doi = {10.4064/sm-63-3-219-228},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-63-3-219-228/}
}