Petkov was one of the main artists of the comics' magazine
Duga ("
Rainbow"), which was the most popular
comics magazine for several generations of Bulgarian children. His series
The Adventures of Choko the Stork and Boko the Frog was popular in
Bulgaria, during the 1970s and 1980s. Other famous animated films he directed are
Friends of Gosho the Elephant,
Treasure Planet, etc. He won the Grand Prize at the Ottawa Animation Festival and the Palme d'Or for
Best Short at the 1985
Cannes Film Festival. In the 1990s, Petkov worked as a writer, storyboard artist, animation director and director on some episodes of
Johnny Bravo, ''
Dexter's Laboratory, Cow and Chicken, I Am Weasel, The New Woody Woodpecker Show'' and other series. He said about animation: "Animation will never die because it's like music, because it's like running with the wind, because it's funny." ==Work==