c(person(given="Andrew", family="Clausen", role="aut"),
    person(given="Serguei", family="Sokol", role=c("aut", "cre"),
    email="sokol@insa-toulouse.fr", comment = c(ORCID = "0000-0002-5674-3327")),
    person(given="Andreas", family="Rappold", role="ctb", email="arappold@gmx.at"))
R-based solution for symbolic differentiation. It admits
    user-defined function as well as function substitution
    in arguments of functions to be differentiated. Some symbolic
    simplification is part of the work.
Andrew Clausen [aut],
  Serguei Sokol [aut, cre] (ORCID:
    <https://orcid.org/0000-0002-5674-3327>),
  Andreas Rappold [ctb]