C. V. Kieu and L. T. Ho, “Allelopathic potential of yellow cosmos (Cosmos sulphureus) and royal poinciana (Delonix regia) on weedy rice (Oryza sativa f. spontanea WR20)”, CTU J. of Inn. & Sus. Dev., vol. 17, no. 1, pp. 135-143, Mar. 2025.