Stella is an artist on the series, and also occasionally assisting Marco Ghiglione with the covers.
- Go, Go Golden Years! (with Andrea Greppi, Emilio Urbano & Michela Frare)
- Spies Like Us! (with Andrea Greppi, Danilo Loizedda, Emilio Urbano & Manuela Razzi)
- The Frightful Family Fishing Trip! (with Ciro Cangialosi)
- Nightmare on Bear Mountain! (with Antonello Dalena & Danilo Loizedda)
- The Greatest Adventure, the Greatest Price! (with Andrea Greppi & Emilio Urbano)
- Countdown to Termination! (with Andrea Greppi & [[Ciro Cangialosi
- The Greatest Invention He's Never Had! (part 1 only, with Ciro Cangialosi & Danilo Loizedda)
- Saga of the Super-Intern! (part 2 only, with Ciro Cangialosi & Danilo Loizedda)
- Where No Duck Has Gone Before, Sort Of! (part 1 only, with Cristina Stella & Ciro Cangialosi)
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