• Aggregation of the ecosystem service values in urban ecosystem account, application of the principles of gross ecosystem product (GEP)Oras, Kaia; Schenau, S.; Bogaart, P.; Aun, Kätlin; Luukas, Grete; Ehrlich, Üllas; Kosk, AijaLondon Group on Environmental Accounting, 27th Meeting2021 / 13 p https://seea.un.org/sites/seea.un.org/files/oras_aggregation-of-the-ecosystem-service-values-in-urban-ecosystem-account-application-of-the-principles-of-gross-ecosystem-product-gep_paper.pdf
• Comparison of methods for the valuation of the nature education ecosystem serviceOras, Kaia; Schenau, S.; Bogaart, P.; Aun, Kätlin; Luukas, Grete; Ehrlich, ÜllasLondon Group on Environmental Accounting, 27th Meeting2021 / 9 p https://seea.un.org/sites/seea.un.org/files/luukas_analyses-of-the-calculation-of-the-valueof-the-nature-education-ecosystem-service_paper.pdf