Hess S, Palma D (2019). Apollo: a flexible, powerful and customisable freeware package for choice model estimation and application. Choice Modelling Centre. R package version 0.0.7, www.ApolloChoiceModelling.com.

Corresponding BibTeX entry:

  @Manual{,
    title = {Apollo: a flexible, powerful and customisable freeware
      package for choice model estimation and application},
    author = {Stephane Hess and David Palma},
    organization = {Choice Modelling Centre},
    year = {2019},
    note = {R package version 0.0.7},
    url = {www.ApolloChoiceModelling.com},
  }