Please cite Concept Explorer FX as follows.
Alternatively, you can use the following BibTeX entry for referencing.
@misc{conexp-fx, author = {Francesco {Kriegel}}, title = {{Concept Explorer FX}}, year = {2010--2018}, note = {{Software for Formal Concept Analysis with Description Logic Extensions}}, url = {https://github.com/francesco-kriegel/conexp-fx}, }