Sketch of a famous artist (Sergey...)
 

Good day.

Found here is just one study -- When bought, called the artist's name, I forgot completely. Maybe someone can suggest painting and signature? Photo attached.

Thank you!

lelya, the signature is read as "Sergei Chernikov", but I like this artist, alas, unknown.

Thank you. Seems to be not so called, but Chernikova really can be read. Here to read the signature, you need a doctor :) They issue prescriptions funny handwriting :)