1990
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- Valter with Sam Francis while working on the Trietto series in Point Reis.
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- Eleonora with Sam Francis while working on the colours of the Trietto series in Point Reis.
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- Eleonora with Sam Francis while working on the colours of the Trietto series in Point Reis.
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- Valter and Eleonora with Sam Francis while working on the Trietto series in Point Reis.
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- The copper plates of the Trietto series in Point Reis.
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- Eleonora with Sam Francis while working on the colours of the Trietto series in Point Reis.
