@incollection {Vel02,
AUTHOR = {Velickovic, Boban},
TITLE = {The basis problem for {CCC} posets},
BOOKTITLE = {Set theory (Piscataway, NJ, 1999)},
SERIES = {DIMACS Ser. Discrete Math. Theoret. Comput. Sci.},
VOLUME = {58},
PAGES = {149--160},
PUBLISHER = {Amer. Math. Soc.},
ADDRESS = {Providence, RI},
YEAR = {2002},
}