@article{10_4153_CJM_1982_040_0,
     author = {Ramras, Mark},
     title = {Bounds on {Betti} {Numbers}},
     journal = {Canadian journal of mathematics},
     pages = {589--592},
     year = {1982},
     volume = {34},
     number = {3},
     doi = {10.4153/CJM-1982-040-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1982-040-0/}
}