@inbook {14215, title = {Preface}, booktitle = {Recent Advances in Orbital-Free Density Functional Theory}, year = {2013}, publisher = {World Scientific}, organization = {World Scientific}, address = {Singapore}, author = {T. A. Weso{\l}owski and Y. A. Wang}, editor = {T. A. Weso{\l}owski and Y. A. Wang} }