@article{JRAM_1975__277_151636,
     author = {Dennis A. McDonald},
     title = {Some special subsets of intervals of a locally finite locally semi-modular, local lattice.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {207--217},
     publisher = {mathdoc},
     volume = {277},
     year = {1975},
     zbl = {0358.06008},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1975__277_151636/}
}