BibTeX: 
@article{Orbit_StabiliserAFP,
author = {Jonas Rädle},
title = {OrbitStabiliser Theorem with Application to Rotational Symmetries},
journal = {Archive of Formal Proofs},
month = aug,
year = 2017,
note = {\url{https://isaafp.org/entries/Orbit_Stabiliser.html},
Formal proof development},
ISSN = {2150914x},
}
