@article{Huffman_1954,
    doi = {10.1016/0016-0032(54)90574-8},
    url = {https://doi.org/10.1016%2F0016-0032%2854%2990574-8},
    year = {1954},
    month = {mar},
    publisher = {Elsevier {BV}},
    volume = {257},
    number = {3},
    pages = {161--190},
    author = {D.A. Huffman},
    title = {The synthesis of sequential switching circuits},
    journal = {Journal of the Franklin Institute}
}

@article{Huffman_1954, doi = {10.1016/0016-0032(54)90574-8}, url = {https://doi.org/10.1016%2F0016-0032%2854%2990574-8}, year = {1954}, month = {mar}, publisher = {Elsevier {BV}}, volume = {257}, number = {3}, pages = {161--190}, author = {D.A. Huffman}, title = {The synthesis of sequential switching circuits}, journal = {Journal of the Franklin Institute} }