Bilan M.I., Burdin K.S., Grigoriev G.V., Evdokimova M.V., Zubkov A.Yu., Ivashkina I.V., Kamnev A.N., Kamneva M.A., Kochurov B.I., Markova S.A., Yakovlev A.S. English-Russian / Russian-English Environmental Science Dictionary Year 2018 587
Kamnev A.N., Kamneva M.A., Grigoriev G.V., Kunz B.F., Putnam L., Pankenier S., Haig K., Scherr B., Koetzsch R. The Conceptual Framework for Proactive and Integrative Environmental Education and Upbringing (PIEEU) Year 2017 73