Interview for MkRu (russian):
https://www.mk.ru/culture/2017/10/10/violonchelist-frider-bertold-nelzya-prevrashhat-koncert-v-massovoe-sborishhe.html
Giornale di Brescia:
https://www.giornaledibrescia.it/tempo-libero/viaggio-al-centro-del-suono-sul-garda-con-17-concerti-1.3270287
