@article{700767,
     title = {Extending point-finite covers},
     booktitle = {General Topology and its Relations to Modern Analysis and Algebra},
     series = {GDML\_Books},
     publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1972},
     pages = {393-398},
     mrnumber = {MR0353255},
     zbl = {0306.54029},
     url = {http://dml.mathdoc.fr/item/700767}
}

Sennott, L. I. Extending point-finite covers, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1972), pp. 393-398. http://gdmltest.u-ga.fr/item/700767/