Gregor, T., Dillenberger, M. S., Schmidt, M., Hand, R., Abdank, A., Böcker, R., … Mutz, S. 2020: Scrophularia neesii and S. umbrosa in Germany – similar ecology but different distribution of two taxa of an autopolyploidy complex. – Kochia 13: 37–52. – doi: 10.21248/kochia.v13.113