@misc {IOPORT.70279740,
    author       = {Prabhakar, Pavithra and D'souza, Deepak},
    title        = {On the expressiveness of MTL with past operators},
    howpublished = {FORMATS, 322-336 (2006).},
    year         = {2006},
    doi          = {10.1007/11867340_23},
    identifier   = {70279740},
}