@article{MOMA_1968__72_177406,
     author = {William D.L. Appling},
     title = {An {Extended} {Notion} of {Refinement-Unboundedness.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {9--17},
     publisher = {mathdoc},
     volume = {72},
     year = {1968},
     zbl = {0195.34202},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1968__72_177406/}
}