The search for ancient life on Mars using morphological and mass spectrometric analysis: an analog study in detecting microfossils in Messinian gypsum - Sellam, Youcef; Gruchola, Salome; Tulej, Marek; Keresztes Schmidt, Peter; Riedo, Andreas; Meddane, Sofiane; Wurz, Peter (Frontiers in Astronomy and Space Sciences, 2025)