Help, please, identify the authors
 

1. "Lilac" 1940. Oil on canvas.
2. Paper, pencil, charcoal or sauce.

First - Estonian artist Christian Teder (Kristjan Teder, 1901-1960). About him quite a lot on the Internet.

Brief biography: Kristjan Teder was a painter and a gardener. He came from Tartumaa and his father was a school-teacher. He studied in the Pallas 1919 at Konrad Mägi in 1919-1925 and at Ado Vabbe in 1933-34. Between these two Pallas-periods Teder studied in Paris at the Vassili Schuchayev's Private Academy. His studies there had a strong effect on his work in late 1920s.

Signed, he is very diverse, including, and the signature that you have a picture.

Thank!