@article{700625,
     title = {Some product theorems},
     booktitle = {General topology and its relations to modern analysis and algebra IV},
     series = {GDML\_Books},
     publisher = {Society of Czechoslovak Mathematicians and Physicist},
     address = {Praha},
     year = {1977},
     pages = {228-230},
     mrnumber = {MR0536412},
     zbl = {0371.54017},
     url = {http://dml.mathdoc.fr/item/700625}
}

Kent, D. C.; Richardson, G. D. Some product theorems, dans General topology and its relations to modern analysis and algebra IV, GDML_Books,  (1977), pp. 228-230. http://gdmltest.u-ga.fr/item/700625/