Silva, Edson, Natália M. Franco, Márcio R. Ferro, and Robson N. Fidalgo.
" Mental Workload Impact of a Visual Language on Understanding SQL Queries." <em>Proceedings of the 30th Brazilian Symposium on Computers in Education,
Brasília/DF, 2019</em>. SBC, 2019,  
pp.239-248.