@book{1323,
	author = {Zeman, Frank},
	title = {Natural elements},
	publisher = {urbanNext,},
	year = {June 30, 2017.},
	note = {Concept, Discipline, Energy and sustainability, Frank Zeman, High Density, Imminent Urban Commons, Urban Paradigms},
	url = {https://urbannext.net/natural-elements/}
}