​         Drawing:  Semi circle with spike..    1991    Ink/pigment on paper  ca. 72 x 56cm

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​            Drawing:  Dark Moon   1991    Ink/pigment on paper  ca. 66 x 53cm

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​           Drawing from series:  Brown circular object    1994    Ink/pigment on paper  ca. 64 x 52cm

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​          Drawing from series:  Red Circle I.    1994    Ink/pigment on paper  ca. 64 x 52cm

          Drawing from series:  Red Circle  II.    1994    Ink/pigment on paper  ca. 64 x 52cm

​         Drawing from series:  Red Circle III.    1994    Ink/pigment on paper  ca. 64 x 52cm

​             Drawing from series:  Red Circle IV.    1994    Ink/pigment on paper  ca. 64 x 52cm

​          Drawing from series:  Red Circle V.    1994    Ink/pigment on paper  ca. 64 x 52cm

​         Drawing from series:  Red Circle VI.    1994    Ink/pigment on paper  ca. 64 x 52cm

​         Drawing from series:  Red Circle VI.    1994    Ink/pigment on paper  ca. 64 x 52cm

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​            Drawing:  Rotes Feld II.   (red field)  2000    Ink/pigment on paper  ca. 45 x 40cm

​           Drawing:  Rotes feld I.   (red field)  2000    Ink/pigment on paper  ca. 45 x 40cm

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        Drawing :  abstract field   1993     Pigment on paper,   ca. 26 x 28cm

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​         Detail of Drawing: Moving between  I.    2015    Ink/pigment on paper  ca. 144 x 116cm

​     Detail of Drawing: Moving between  I.    2015    Ink/pigment on paper  ca. 144 x 116cm

​    Detail of Drawing: Moving between II.    2015    Ink/pigment on paper  ca. 144 x 116cm

​   Detail of Drawing: Moving between II.    2015    Ink/pigment on paper  ca. 144 x 116cm

​       Drawing: Moving between II.    2015    Ink/pigment on paper  ca. 144 x 116cm