In so doing , he criticized prominent paleontologists .
Across the monographs in the Dinosaur Museum Journal , Stephen Czerkas built a case for his controversial view that maniraptoran dinosaurs are secondarily flightless birds .
In so doing , Stephen Czerkas criticized prominent paleontologists .
Across the monographs in the Dinosaur Museum Journal , Stephen Czerkas built a case for his controversial view that maniraptoran dinosaurs are secondarily flightless birds .