To cite rSPDE in publications use:

Bolin D, Kirchner K (2019). “The rational SPDE approach for Gaussian random fields with general smoothness.” Journal of Computational and Graphical Statistics. In Press.

Corresponding BibTeX entry:

    title = {The rational {SPDE} approach for {Gaussian} random fields
      with general smoothness},
    author = {David Bolin and Kristin Kirchner},
    journal = {Journal of Computational and Graphical Statistics},
    year = {2019},
    note = {In Press},