Chernov, Vladimir Max Planck Institute for Mathematics, Max Planck Society;
https://arxiv.org/abs/1406.0875 (Preprint)
https://doi.org/10.4064/fm969-10-2015 (Publisher version)
Chernov, V., & Sadykov, R. (2016). Virtual Legendrian isotopy. Fundamenta Mathematicae, 234(2), 127-137. doi:10.4064/fm969-10-2015.