Kim, D.-G., G.-W. Kim, S.-H. Lee, J.-T. Park, and W.-H. Lee. “Optimization of Growth Conditions for Forage Production in a Fresh Forage Growing System”. Emirates Journal of Food and Agriculture, vol. 31, no. 10, Oct. 2019, pp. 759-67, doi:10.9755/ejfa.2019.v31.i10.2016.