@book { LPLAStructuredLanguageforModelingLinearPrograms,
    title = "LPL:- A Structured Language for Modeling Linear Programs",
    subtitle = "A Structured Language for Modeling Linear Programs",
    author = "Tony {Hürlimann}",
    year = "1988",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1073800"
}