R. R. Barreto, C. A. Scapim, A. T. do Amaral Júnior, M. de A. Rodovalho, R. A. Vieira, and A. R. Schuelter, “Evaluation of the combining ability of S2 popcorn families using different testers”, Semina: Ciênc. Agrár., vol. 33, no. 3, pp. 873–890, Jun. 2012.