@incollection {VelEr-Rh,
AUTHOR = {Er-rhaimini, Karim and Veli{\v{c}}kovi{\'c}, Boban},
TITLE = {P{CF} structures of height less than {$\omega_3$}},
JOURNAL = {J. Symbolic Logic},
FJOURNAL = {Journal of Symbolic Logic},
VOLUME = {75},
NUMBER = {4},
PAGES = {1231--1248},
YEAR = {2010},
}