@article{knuth74,
    author = {Knuth, Donald E.},
    title = {Computer Programming As an Art},
    journal = {Commun. ACM},
    year = {1974},
    pages = {667--673},
    numpages = {7},
    publisher = {ACM},
    address = {New York, NY, USA}
}

@article{knuth92,
    author = {Knuth, Donald E.},
    title = {Two notes on notation},
    journal = {Amer. Math. Monthly},
    volume = {99},
    year = {1992},
    pages = {403--422}
}

@book{lamport94,
    title = {LaTeX: A Document Preparation System},
    author = {Lamport, Leslie},
    year = {1994},
    publisher = {Pearson Education India}
}