To cite package 'bvpSolve' in publications use:

Francesca Mazzia, Jeff R. Cash, Karline Soetaert (2014). Solving boundary value problems in the open source software R: Package bvpSolve. Opuscula mathematica, 34(2), 387--403. URL http://dx.doi.org/10.7494/OpMath.2014.34.2.387

Corresponding BibTeX entry:

  @Article{,
    title = {Solving boundary value problems in the open source
      software R: Package bvpSolve},
    author = {Francesca Mazzia and Jeff R. Cash and Karline Soetaert},
    journal = {Opuscula mathematica},
    volume = {34},
    number = {2},
    pages = {387--403},
    year = {2014},
    url = {http://dx.doi.org/10.7494/OpMath.2014.34.2.387},
  }