Please use the following reference for the current version of MLatom:
Pavlo O. Dral, MLatom: A Program Package for Quantum Chemical Research Assisted by Machine Learning. J. Comput. Chem. 2019, Early View. DOI: 10.1002/jcc.26004.
Pavlo O. Dral, MLatom: A Package for Atomistic Simulations with Machine Learning, version 1.0. Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany, 2013–2019. http://MLatom.com.
Please also cite the relevant literature for the features you used. Suggested citations are provided in above paper in J. Comput. Chem. and on Features page in form of web links.
Citations for older releases can be found here.