Value of forest recreation. Meta-analyses of the European valuation studies / Marek Giergiczny, Sviataslau Valasiuk, Maria de Salvo, Giovanni Signorello // Ekonomia i Środowisko. - 2014 nr 4 (51), strony 76-83

Biography omicsonline, 26.01.2023 https://biography.omicsonline.org/italy/university-of-catania/giovanni-signorello-481254

BNPol online

Uniwersytet w Katanii, 26.01.2023 https://www.di3a.unict.it/faculty/giovanni.signorello