"Oak", 1934, tempera, 25.4 x 20.3 cm, National Museum, Warsaw
"Untitled", from the series Faces, 1942, drawing, National Museum, Warsaw
"Sun's After-Image", Museum of Art, Lodz

"Unist Composition 14", 1934, Museum of Art, Lodz
"Unist Composition II (10)", 1931, oil on canvas, Museum of Art, Lodz
"Lodz Landscape", 1931, Museum of Art, Lodz

[...] artists who turned towards other international avantgarde tendencies. From the moment of his return to Poland in 1923, Wladyslaw Strzeminski, whose artistic individuality assumed form in revolutionary Russia, painted canvases according to his own doctrine which he subsequently called unism. The latter consisted of total resignation from the depiction of reality and of reducing the structure of the painting to an arrangement of uniform small elements which produced optical unity. [*]

Artist biography at Wikipedia: http://en.wikipedia.org/wiki/Władysław_Strzemiński