@incollection{TUW-209559, author = {Huang, Haosheng and Gartner, Georg}, title = {A Technical Survey on Decluttering of Icons in Online Map-based Mashups}, booktitle = {Online Maps with APIs and WebServices}, year = {2012}, pages = {157--175}, publisher = {Springer Verlag}, doi = {10.1007/978-3-642-27485-5{\_}11} }