Martins N, Gonçalves S, Romano A. Metabolism and aluminum accumulation in Plantago almogravensis and P. algarbiensis in response to low pH and aluminum stress. Biologia Plantarum. 2013;57(2):325 - 331. doi:10.1007/s10535-012-0271-3

Gonçalves S, Martins N, Romano A. Micropropagation and conservation of endangered species Plantago algarbiensis and P. almogravensis. Biologia Plantarum. 2009;53(4):774 - 778. doi:10.1007/s10535-009-0142-8

Martins N, Gonçalves S, Palma T, Romano A. Seed germination of two critically endangered plantain species, Plantago algarbiensis and P. almogravensis (Plantaginaceae). Seed Science and Technology. 2012;40(1):144 - 149. doi:10.15258/sst.2012.40.1.19