Andriessen signed his paintings variously using his full signature , his initials or monogram .
The number of works currently attributed to Andriessen range from six to nine of which five are said to be signed .
Andriessen signed Andriessen 's paintings variously using his full signature , his initials or monogram .
The number of works currently attributed to Andriessen range from six to nine of which five are said to be signed .