@article{article3e3e1d09,
title   = {Adenine and 2-aminopurine: paradigms of modern theoretical photochemistry},
author = {Serrano-Andrés, Luis and Merchán, Manuela and Borin, Antonio Carlos},
year = {2006},
doi = {10.1073/pnas.0602991103},
journal   = {Proceedings of the National Academy of Sciences of the United States of America - PNAS}
}