Lansdown, Richard, and Markus Ruhsam. “YELLOW WATER LILIES (NUPHAR, NYMPHAEACEAE) IN GREAT BRITAIN: A NEW HYBRID, A REAPPRAISAL OF RECORDS, AND A REVISED STATUS OF N. ADVENA”. Edinburgh Journal of Botany, vol. 79, Dec. 2022, pp. 1-15, https://doi.org/10.24823/ejb.2022.1925.