@article{700670,
     title = {Extension of measures and integrals by the help of a pseudometric},
     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 = {[390]-392},
     zbl = {0371.28012},
     url = {http://dml.mathdoc.fr/item/700670}
}

Riečan, B. Extension of measures and integrals by the help of a pseudometric, dans General topology and its relations to modern analysis and algebra IV, GDML_Books,  (1977), pp. [390]-392. http://gdmltest.u-ga.fr/item/700670/