AUTHOR=Hofer Thomas S. TITLE=From macromolecules to electrons—grand challenges in theoretical and computational chemistry JOURNAL=Frontiers in Chemistry VOLUME=1 YEAR=2013 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2013.00006 DOI=10.3389/fchem.2013.00006 ISSN=2296-2646