To cite package 'umx' in publications use:
Bates TC, Neale MC, Maes HH (2019).“umx: A library for Structural Equation and Twin Modelling in R.”Twin Research and Human Genetics,22, 27-41.doi:10.1017/thg.2019.2.
Corresponding BibTeX entry:
@Article{, title = {umx: A library for Structural Equation and Twin Modelling in R}, author = {Timothy C. Bates and Michael C. Neale and Hermine H. Maes}, journal = {Twin Research and Human Genetics}, publisher = {Cambridge Press}, year = {2019}, volume = {22}, pages = {27-41}, doi = {10.1017/thg.2019.2}, }