We don't own any of the reference images above. They belong to their creators. We only used them for inspiration. 
Links to the images found on the Internet: REF1, REF2, REF3, REF4, REF 5, REF6.

by Olga Serova

by Marina Vetokhina

by Екатерина Маслова

by Brushiee ♥

by СиринCirin

by Lyudmila Korytova

by Malka Illustrator

by Ольга Самойлова

by Nataliya Alekseeva

by Николай Капустников