Senanayake, N., Ananda, W.W.S.R.M.R. and Pathirana, R.P.S.P., 1986. Threshold density of Echinocloa crusgalli (L) Beauv. in rice weed competition. Journal of the National Science Foundation of Sri Lanka, 14(2), pp.181–188. DOI: http://doi.org/10.4038/jnsfsr.v14i2.8313

Senanayake N, Ananda WWSRMR, Pathirana RPSP. Threshold density of Echinocloa crusgalli (L) Beauv. in rice weed competition. Journal of the National Science Foundation of Sri Lanka. 1986;14(2):181–8. DOI: http://doi.org/10.4038/jnsfsr.v14i2.8313

Senanayake, N., Ananda, W. W. S. R. M. R., & Pathirana, R. P. S. P. (1986). Threshold density of Echinocloa crusgalli (L) Beauv. in rice weed competition. Journal of the National Science Foundation of Sri Lanka, 14(2), 181–188. DOI: http://doi.org/10.4038/jnsfsr.v14i2.8313

Senanayake N, Ananda WWSRMR and Pathirana RPSP, ‘Threshold Density of echinocloa Crusgalli (l) Beauv. In Rice Weed Competition’ (1986) 14 Journal of the National Science Foundation of Sri Lanka 181 DOI: http://doi.org/10.4038/jnsfsr.v14i2.8313

Senanayake, N., W. W. S. R. M. R. Ananda, and R. P. S. P. Pathirana. 1986. “Threshold Density of echinocloa Crusgalli (l) Beauv. In Rice Weed Competition”. Journal of the National Science Foundation of Sri Lanka 14 (2): 181–88. DOI: http://doi.org/10.4038/jnsfsr.v14i2.8313

Senanayake, N., W. W. S. R. M. R. Ananda, and R. P. S. P. Pathirana. “Threshold Density of echinocloa Crusgalli (l) Beauv. In Rice Weed Competition”. Journal of the National Science Foundation of Sri Lanka 14, no. 2 (1986): 181–88. DOI: http://doi.org/10.4038/jnsfsr.v14i2.8313

Senanayake, N., et al.. “Threshold Density of echinocloa Crusgalli (l) Beauv. In Rice Weed Competition”. Journal of the National Science Foundation of Sri Lanka, vol. 14, no. 2, 1986, pp. 181–88. DOI: http://doi.org/10.4038/jnsfsr.v14i2.8313