The interpretive outline drawing of theropod tracks at

The interpretive outline drawing of pterosaur tracks at Huangyangquan

Late Jurassic dinosaur footprints from Chassiron–La Morelière (Oléron Island, western France)

Evidence for a mixed-age group in a pterosaur footprint assemblage from the early Upper Cretaceous of Korea

The interpretive outline drawing of theropod tracks at Huangyangquan

Photograph (a) and interpretive outline drawing (b) for the theropod

The new ichnotaxon Eubrontes nobitai ichnosp. nov. and other saurischian tracks from the Lower Cretaceous of Sichuan Province and a review of Chinese Eubrontes-type tracks, Journal of Palaeogeography

Theropod sketch practice by azurilyum on DeviantArt

Crouching Theropod and Navahopus Sauropodomorph Tracks from the Early Jurassic Navajo Sandstone of USA

Automatic generation of objective footprint outlines [PeerJ]