@article{AM2_1991__42_3_137429,
     author = {Harry I. Miller},
     title = {On several classes of sets {II.}},
     journal = {Aequationes mathematicae},
     pages = {190--201},
     publisher = {mathdoc},
     volume = {42},
     number = {3},
     year = {1991},
     zbl = {0735.28002},
     url = {http://geodesic.mathdoc.fr/item/AM2_1991__42_3_137429/}
}