Alzurfi, S. K. L., Motar, A. A., & Sharba, F. Y. J. (2019). The Competition between of invasive Hydrilla verticillata L.f. and native Ceratophyllum demersum L. in monocultures and mixed cultures experimental. Iraqi Journal of Science, 60(9), 1933-1947. https://doi.org/10.24996/ijs.2019.60.9.6