Direct digital manufacturing and polymers : 2nd International Conference on Direct Digital Manufacturing and Polymers (2nd CDDMAP). Selected, peer-reviewed papers from the 2nd International Conference on Direct Digital Manufacturing and Polymers (2nd CDDMAP), May 15-18, 2017, Marinha Grande, Portugal - Mitchell, Geoffrey; Alves, Nuno; Dos Mateus, Artur Jorge (Scientific.Net, 2019)