Author:
Delimitreva Stefka,Boneva Gabriela,Chakarova Irina,Hadzhinesheva Valentina,Zhivkova Ralitsa,Markova Maya,Nikolova Venera,Kolarov Anton,Mladenov Nikola,Bradyanova Silviya,Prechl József,Mihaylova Nikolina,Tchorbanov Andrey
Publisher
Springer Science and Business Media LLC