[1]
Grasman, R., van der Maas, H.L. and Wagenmakers, E.-J. 2009. Fitting the Cusp Catastrophe in R: A cusp Package Primer. Journal of Statistical Software. 32, 8 (Nov. 2009), 1–27. DOI:https://doi.org/10.18637/jss.v032.i08.