2013 Decoster, Ochmann, Spiritus EUROMOD WP 20_13 Integrating Indirect Taxation into EM. Documentation Results Germany Posted on January 7, 2016January 7, 2016 by Sebastiaan Maes 2013 Decoster, Ochmann, Spiritus EUROMOD WP 20_13 Integrating Indirect Taxation into EM. Documentation Results Germany