@article{articlee3c94203, title = {Risk management in e-commerce: a fraud study case using acoustic analysis through its complexity}, author = {Nascimento, Diego Carvalho and Barbosa, Bruno and Perez, André Marcos and Caires, Daniel de Oliveira and Hirama, Edgar Tamio and Ramos, Pedro Luiz and Louzada, Francisco}, year = {2019}, doi = {10.3390/e21111087}, journal = {Entropy} }