@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20160107-162226619,
    title = "Advances in Neural Information Processing Systems 2 (NIPS 1989)",
    chapter = "Analog Circuits for Constrained Optimization",
    year = "1990",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20160107-162226619",
    id = "record",
    isbn = "1-55860-100-7"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20161208-124010547,
    title = "SIGGRAPH '88 Proceedings of the 15th annual conference on Computer graphics and interactive techniques",
    chapter = "Constraints methods for flexible models",
    year = "1988",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20161208-124010547",
    id = "record",
    isbn = "0-89791-275-6",
    doi = "10.1145/54852.378524"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20160107-151945992,
    title = "Neural Information Processing Systems",
    chapter = "Constrained Differential Optimization",
    year = "1988",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20160107-151945992",
    id = "record",
    isbn = "0883185695"
}