@misc {IOPORT.70472171,
    author       = {Baghaei, Nilufar},
    title        = {A collaborative constraint-based adaptive system for learning object-oriented analysis and design using UML},
    howpublished = {AH, 398-403 (2006).},
    year         = {2006},
    doi          = {10.1007/11768012_58},
    identifier   = {70472171},
}