@article{700600,
     title = {Semiuniform spaces, and seminorms, semimetrics, semiecarts in apo-semigroups},
     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 = {1971},
     pages = {[163]-171},
     mrnumber = {MR0286725},
     zbl = {0225.54027},
     url = {http://dml.mathdoc.fr/item/700600}
}

Krishnan, V. S. Semiuniform spaces, and seminorms, semimetrics, semiecarts in apo-semigroups, dans General Topology and Its Relations to Modern Analysis and Algebra, GDML_Books,  (1971), pp. [163]-171. http://gdmltest.u-ga.fr/item/700600/