@article{openbabel, author = {R. Guha and M. T. Howard and G. R. Hutchison and P. Murray-Rust and H. Rzepa and C. Steinbeck and J. K. Wegner and E. Willighagen}, title = {The Blue Obelisk -- Interoperability in Chemical Informatics}, journal = "J. Chem. Inf. Model.", year = 2006, volume = 46, pages = 991, notes = {The Open Babel Package, version 2.0.1 {\tt http://openbabel.sourceforge.net/}} }