@article{700812,
     title = {Continuous mappings of extensions of a topological space},
     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 = {209-214},
     mrnumber = {MR0370505},
     zbl = {0309.54024},
     url = {http://dml.mathdoc.fr/item/700812}
}

Ivanova, V. M.; Ivanov, A. A. Continuous mappings of extensions of a topological space, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1972), pp. 209-214. http://gdmltest.u-ga.fr/item/700812/