Else Alfeld (1910-1974) This painting is made in 1948 and is called 'Mountains'.
Else Alfeld was a Danish painter and a member of the COBRA movement. COBRA or Cobra, often stylized as CoBrA, was a European avant-garde art group active from 1948 to 1951. The name was coined in 1948 by Christian Dotremont from the initials of the members' home countries' capital cities: Copenhagen (Co), Brussels (Br), Amsterdam (A)
(Wikipedia)
Cobra Museum - Amstelveen - Holland