Were both Petar B. Vasilev and René Laloux involved in the film industry?
Petar B. Vasilev: Petar B. Vasilev nicknamed Milevin (Bulgarian: Петър Б. Petar B. Vasilev:  Василев-Милевин ) (1918–2001), was a Bulgarian film director and screenwriter. René Laloux: René Laloux (July 13, 1929 – March 14, 2004) was a French animator and film director.
i don't know