@article{MS2_1972__31_166276,
     author = {J.F. Aarnes and P.R. Andenaes},
     title = {On {Nets} and {Filters.}},
     journal = {Mathematica Scandinavica},
     pages = {285--292},
     publisher = {mathdoc},
     volume = {31},
     year = {1972},
     zbl = {0268.54005},
     url = {http://geodesic.mathdoc.fr/item/MS2_1972__31_166276/}
}