In addition to the signature on the front, paintings usually have a second signature on the back.
Each work is marked with a work number, which is marked on the back of the worksheet. Exception: sketches have no work numbers.
On the back side, it is also noted in which period the work was made.
This catalog is not complete.
Under this link you will find, if available, the corresponding related works, i.e. sketches or graphics, and the final work.
Sizes are generally given in height x width (x depth) in cm.