Verifying volume rendering using discretization error analysis - Etiene, Tiago; Jönsson, Daniel; Ropinski, Timo; Scheidegger, Carlos; Comba, João Luiz Dihl; Nonato, Luis Gustavo; Kirby, Robert M; Ynnerman, Anders; Silva, Cláudio T (IEEE Transactions on Visualization and Computer Graphics, 2014)