@article{700631,
     title = {Subcategories with cartesian closed coreflective hull},
     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 = {[329]-330},
     mrnumber = {MR0464135},
     zbl = {0365.54001},
     url = {http://dml.mathdoc.fr/item/700631}
}

Nel, L. D. Subcategories with cartesian closed coreflective hull, dans General topology and its relations to modern analysis and algebra IV, GDML_Books,  (1977), pp. [329]-330. http://gdmltest.u-ga.fr/item/700631/