@article{Pugh_1990,
    doi = {10.1145/78973.78977},
    url = {https://doi.org/10.1145%2F78973.78977},
    year = {1990},
    month = {jun},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {33},
    number = {6},
    pages = {668--676},
    author = {William Pugh},
    title = {Skip lists: a probabilistic alternative to balanced trees},
    journal = {Communications of the {ACM}}
}

@article{Pugh_1990, doi = {10.1145/78973.78977}, url = {https://doi.org/10.1145%2F78973.78977}, year = {1990}, month = {jun}, publisher = {Association for Computing Machinery ({ACM})}, volume = {33}, number = {6}, pages = {668--676}, author = {William Pugh}, title = {Skip lists: a probabilistic alternative to balanced trees}, journal = {Communications of the {ACM}} }