by Radulović, Dejan, Duarte, António Portugal, Radovanović, Milan, Shpak, Natalia A, Vuković, Darko B
Published in Zbornik radova (Geografski institut "Jovan Cvijić". Online) (2015)

by Obradović, S L, Babović, S, Shpak, N
Published in Trames (01.03.2016)

by Mingaleva, Zhanna, Shpak, Natalia
Published in Thermal science (2015)

by Lović Obradović, Suzana, Babović, Stefana, Shpak, Natalia
Published in Trames (Tallinn) (2016)

by Vukovic, Darko, Simeunovic, Ivana, Zalesov, Sergey, Yamashkin, Anatoly, Shpak, Natalia
Published in Thermal science (2015)

by Darko B. Vuković, Natalia A. Shpak, Milan M. Radovanović, Antonio Portugal Duarte, Dejan Radulović
Published in Zbornik radova (Geografski institut "Jovan Cvijić". Online) (01.08.2015)

by Eydenzon, D., Ganieva, I., Shpak, N.
Published in Ekonomika regiona (2013)