@misc{liao:kim:miyano:zhang:21,
    Author = {Steven Liao and Kim, In Song and Miyano, Sayumi and Zhang, Hao},
    Howpublished = {available at the {Comprehensive R Archive Network (CRAN)}},
    Note = {\url{http://CRAN.R-project.org/package=concordance}},
    Title = {{concordance}: Product Concordance},
    Year = {2021}}