To cite crmPack in publications use:

Sabanés Bové D, Yeung WY, Palermo G, Jaki T (2019). “Model-Based Dose Escalation Designs in R with crmPack.” Journal of Statistical Software, 89(10), 1–22. doi:10.18637/jss.v089.i10.

Corresponding BibTeX entry:

    title = {Model-Based Dose Escalation Designs in {R} with
    author = {Daniel {Saban\'es Bov\'e} and Wai Yin Yeung and Giuseppe
      Palermo and Thomas Jaki},
    journal = {Journal of Statistical Software},
    year = {2019},
    volume = {89},
    number = {10},
    pages = {1--22},
    doi = {10.18637/jss.v089.i10},