Multilevel modeling of two cyclical processes: extending differential structural equation modeling to nonlinear coupled systems
Psychological Methods (2005) - Comment
pubmed: 15998175  doi: 10.1037/1082-989x.10.2.159  issn: 1082-989x  issn: 1939-1463 

Jonathan Butner, Polemnia G. Amazeen, Genna M. Mulvey