To cite the 'MCI' package in publications use:

Wieland T (2017). “Market Area Analysis for Retail and Service Locations with MCI.” The R Journal, 9(1), 298–323. https://journal.r-project.org/archive/2017/RJ-2017-020/RJ-2017-020.pdf.

Corresponding BibTeX entry:

  @Article{,
    title = {{M}arket {A}rea {A}nalysis for {R}etail and {S}ervice
      {L}ocations with {MCI}},
    author = {Thomas Wieland},
    year = {2017},
    journal = {The R Journal},
    volume = {9},
    number = {1},
    pages = {298--323},
    url =
      {https://journal.r-project.org/archive/2017/RJ-2017-020/RJ-2017-020.pdf},
  }