Wasi Ullah Khan, Rahmat Ali Khan and Safir Ullah Khan 2017. Effect of Centaurea pullata Methanolic Extract on the Growth of Portulaca oleracea. Journal of Basic & Applied Sciences. 13, (Jan. 2017), 496–499. DOI:https://doi.org/10.6000/1927-5129.2017.13.81.