Gravity resonance spectroscopy and dark energy symmetron fields - qBOUNCE experiments performed with Rabi and Ramsey spectroscopyTobias Jenke, Joachim Bosina, Jakob Micko, Mario Pitschmann, René Sedmik and Hartmut AbeleEur. Phys. J. Spec. Top., 230 4 (2021) 1131-1136DOI: https://doi.org/10.1140/epjs/s11734-021-00088-y