@misc {IOPORT.70661209,
    author       = {Trinh, Thanh-Hai and Querrec, Ronan and De Loor, Pierre and Chevaillier, Pierre},
    title        = {Ensuring semantic spatial constraints in virtual environments using UML/OCL},
    howpublished = {VRST, 219-226 (2010).},
    year         = {2010},
    doi          = {10.1145/1889863.1889912},
    identifier   = {70661209},
}