@article{700771,
     title = {$H$-closed extensions of topological spaces},
     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 = {93-95},
     mrnumber = {MR0362220},
     zbl = {0311.54027},
     url = {http://dml.mathdoc.fr/item/700771}
}

Császár, K. $H$-closed extensions of topological spaces, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1972), pp. 93-95. http://gdmltest.u-ga.fr/item/700771/