To cite dcminfo package in publications use:

Liu, Y. & Xin, T. (2017). dcminfo: Information Matrix for Diagnostic Classification Models R package version 0.1.7. Retrived from https://CRAN.R-project.org/package=dcminfo

Corresponding BibTeX entry:

  @Manual{,
    title = {{dcminfo: Information Matrix for Diagnostic Classification
      Models}},
    author = {{Liu} and {Y.} and {Xin} and {T.}},
    year = {2017},
    note = {R package version 0.1.6},
    url = {https://CRAN.R-project.org/package=dcminfo},
  }