@article {IOPORT.50230995,
    author       = {Gabrielov, Andrei and Vorobjov, Nicolai},
    title        = {Complexity of stratifications of semi-Pfaffian sets},
    year         = {1995},
    journal      = {Discrete & Computational Geometry},
    volume       = {14},
    number       = {1},
    pages        = {71-91},
    doi          = {10.1007/BF02570696},
    identifier   = {50230995},
}