Impressionist Still Life 1921...bouquet Of Roses & Vase...a Cyrillic Signature?

Interesting impressionist still life dated 1921 which represents a luminous bouquet of roses in a white vase... The work is signed lower left, but the signature is difficult to understand / see detail of photo 6: perhaps it is a signature in Cyrillic, which would point more towards a Slavic artist. Indeed, it is an alphabet which is current in Russia, Bulgaria, Serbia, Macedonia, Belarus, Ukraine, to name only the main countries here... note: it is a work of rather breathtaking quality, as much in its tone as in the force which it releases: it is the kind of painting which can correspond to the work of an excellent painter and it would deserve research to try to identify its author / advice to research enthusiasts. Canvas size: 32 cm x 26 cm - ask me for other photos if necessary -