Yano-Melo, A. M., Vicente, C., & Xavier-Filho, L. (1999). Allelopathic effect of the Cladonia verticillaris lichen extracts and fumarprotocetraric acid on the early growth of germinating seeds and seedlings in Allium cepa L. International Journal of Horticultural Science, 5(3-4), 31-35. https://doi.org/10.31421/IJHS/5/3-4/39