H. A. Oliveira, J. F. V. Moraes, M. M. Pilczer, R. E. Kalckmann, and J. G. C. Silva, “Effects of nitrogen, phosphorus, potassium and lime applications on production of peas (<i>Pisum sativam</i> L.) In Rosário do Sul, Rio Grande do Sul, Brazil”, PAB, vol. 3, no. 1, pp. 243–253, Apr. 2014.