@inproceedings{2014apn6.confE..18D, title = {Estimating the binary fraction of central stars of planetary nebulae using the infrared excess method}, author = {{Douchin}, D. and {De Marco}, O. and {Frew}, D.~J. and {Jacoby}, G.~H. and {Fitzgerald}, M. and {Jasniewicz}, G. and {Moe}, M. and {Passy}, J.~C. and {Hillwig}, T. and {Harmer}, D.}, booktitle = {Asymmetrical Planetary Nebulae VI Conference}, pages = {18}, year = {2014}, doi = {} }