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+**Documentation**
+
+[![Documentation Status: stable](https://readthedocs.org/projects/cpp-ptb/badge/?version=stable)](https://cpp-ptb.readthedocs.io/en/stable/?badge=stable)
+
 **Cite it**
 
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.4007672.svg)](https://doi.org/10.5281/zenodo.4007672)