Momentary mood response to natural outdoor environments in four European cities oleh Michelle C. Kondo, Margarita Triguero-Mas, David Donaire-Gonzalez, Edmund Seto, Antònia Valentín, Gemma Hurst, Glòria Carrasco-Turigas, Daniel Masterson, Albert Ambròs, Naomi Ellis, Wim Swart, Nora Davis, Jolanda Maas, Michael Jerrett, Christopher J. Gidlow, Mark J. Nieuwenhuijsen