1. J. G. TROMLITZ’S ARTICULATORY PHONETICS IN FLUTE SOUND FORMATION. Authors: VOLODYMYR KACHMARCHYK, NATALIIA KACHMARCHYK.2. A “WELL-TEMPERED FLUTE” BY T. BOEHM – THE FINAL STAGE OF ITS EVOLUTION AND THE STANDARDIZATION OF ITS TUNING SYSTEM. Authors: NATALIIA KACHMARCHYK, VOLODYMYR KACHMARCHYK.