Robles, A.B. y Castro, J. 2002. Effect of thermal shock and ruminal incubation on seed germination in Helianthemum apenninum (L.) Mill. (Cistaceae). Acta Botanica Malacitana. 27, (dic. 2002), 41–47. DOI:https://doi.org/10.24310/abm.v27i0.7307.