try cff for citation

QuasiNormalModeExpansion/CITATION.cff

+cff-version: 1.2.0
+title: QNM expansions using ONELAB and SLEPc
+message: >-
+  If you use this software, please cite it using the
+  metadata from this file.
+type: software
+authors:
+  - given-names: Guillaume
+    family-names: Demésy
+    email: guillaume.demesy@fresnel.fr
+repository-code: >-
+  https://gitlab.onelab.info/doc/models/-/tree/master/QuasiNormalModeExpansion