M. Muzekenyi, J. Zuwarimwe, and B. Kilonzo, “Analysis of technical efficiency of small-scale commercial farmers in Vhembe district ”, S Afr. Jnl. Agric. Ext., vol. 49, no. 1, pp. 91–104, Apr. 2021, doi: 10.17159/2413-3221/2021/v49n1a10780.