@article {IOPORT.50147651,
    author       = {Rosenthal, Arnon and Helman, Paul},
    title        = {Understanding and extending transformation-based optimizers},
    year         = {1986},
    journal      = {IEEE Database Eng. Bull.},
    volume       = {9},
    number       = {4},
    pages        = {44-51},
    identifier   = {50147651},
}