%0 Journal Article %T Study of competitive transport of metal cations through bulk liquid membrane using 4’-nitrobenzo-18-crown-6 and diaza-18-crown-6 %A Ronaghi, Gholam Hossein %A Hosseiny, Malihe Sadat %A CHamsaz, Mahmod %J Journal of Inclusion Phenomena and Macrocyclic Chemistry %@ 1388-3127 %D 2011