Hughey et al. (2021), p. 145 Hughey, Jeffery R.; Gabrielson, Paul W.; Maggs, Christine A.; Mineur, Frédéric (2021). "Genomic analysis of the lectotype specimens of European Ulva rigida and Ulva lacinulata (Ulvaceae, Chlorophyta) reveals the ongoing misapplication of names". European Journal of Phycology. 57 (2): 143–153. doi:10.1080/09670262.2021.1914862. S2CID236257717.
Hughey et al. (2021), p. 145 Hughey, Jeffery R.; Gabrielson, Paul W.; Maggs, Christine A.; Mineur, Frédéric (2021). "Genomic analysis of the lectotype specimens of European Ulva rigida and Ulva lacinulata (Ulvaceae, Chlorophyta) reveals the ongoing misapplication of names". European Journal of Phycology. 57 (2): 143–153. doi:10.1080/09670262.2021.1914862. S2CID236257717.