To cite EZtune in publications use:

Jill Lundell (2017). There has to be an easier way: a simple alternative for parameter tuning of supervised learning methods. JSM Proceedings, Statistical Computing Section. Alexandria, VA: American Statistical Association, 3028--3036.

Corresponding BibTeX entry:

@Article{, title = {There has to be an easier way: a simple alternative for parameter tuning of supervised learning methods}, author = {Jill F Lundell}, journal = {JSM Proceedings, Statistical Computing Section. Alexandria, VA: American Statistical Association}, year = {2017}, pages = {3028--3036}, }