Germán Gonzalo Creamer Bernardo Creamer A Non-Linear Dependence Analysis of Oil, Coal and Natural Gas Futures with Brownian Distance Correlation. 2014 AAAI Fall Symposia http://www.aaai.org/ocs/index.php/FSS/FSS14/paper/view/9183 conf/aaaifs/2014 db/conf/aaaifs/aaaifs2014.html#CreamerC14