To cite fechner in publications use:
Ünlü A, Kiefer T, Dzhafarov EN (2009). “Fechnerian Scaling in R: The Package fechner.” Journal of Statistical Software, 31(6), 1–24. https://www.jstatsoft.org/article/view/v031i06.
Corresponding BibTeX entry:
@Article{, title = {Fechnerian Scaling in {R}: The Package {fechner}}, author = {Ali \"Unl\"u and Thomas Kiefer and Ehtibar N. Dzhafarov}, journal = {Journal of Statistical Software}, year = {2009}, volume = {31}, number = {6}, pages = {1--24}, url = {https://www.jstatsoft.org/article/view/v031i06}, }