To cite package ‘Rvcg’ in publications use:

  Schlager S (2017). “Morpho and Rvcg - Shape Analysis in R.” In Zheng
  G, Li S, Szekely G (eds.), _Statistical Shape and Deformation
  Analysis_, 217-256. Academic Press. ISBN 9780128104934.

A BibTeX entry for LaTeX users is

  @InCollection{,
    author = {Stefan Schlager},
    title = {Morpho and Rvcg -- Shape Analysis in {R}},
    booktitle = {Statistical Shape and Deformation Analysis},
    publisher = {Academic Press},
    year = {2017},
    editor = {Guoyan Zheng and Shuo Li and Gabor Szekely},
    pages = {217--256},
    isbn = {9780128104934},
  }