Verloove, Filip. 2003. “Physalis ixocarpa Brot. ex Hornem. and Verbena litoralis Kunth, new Spanish xenophytes and records of other interesting alien vascular plants in Catalonia (Spain)”. Lazaroa 24, nº January: 7-11. https://revistas.ucm.es/index.php/LAZA/article/view/LAZA0303110007A