Ruiz, C. R., and T. Navarro. “Teucrium × gutierrezii A New Hybrid from Southeast Iberian Peninsula, a Hotspots of Natural Hybridization of Subfamily Ajugoideae (Lamiaceae)”. Phytotaxa, vol. 609, no. 1, Aug. 2023, pp. 45-54, doi:10.11646/phytotaxa.609.1.4.