title: ROSAT X-ray Clusters in Open Universes.
authors.affiliation: DAEC, Observatoire de Meudon 92195 Meudon, FranceUniversite D.Diderot 75005 Paris, France.
authors.forename: J
authors.initials: J
authors.lastname: Oukbir
authors.affiliation: DAEC, Observatoire de Meudon 92195 Meudon, FranceUniversite D.Diderot 75005 Paris, France.
authors.forename: A
authors.initials: A
authors.lastname: Blanchard