@article{INTF_1996_74_a6,
     author = {H. Grauert},
     title = {Chapter~6. {Theory} of $q$-convexity and $q$-concavity},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya },
     pages = {331--363},
     publisher = {mathdoc},
     volume = {74},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTF_1996_74_a6/}
}