A potential global stratotype for the Sinemurian-Pliensbachian boundary (Lower Jurassic), Robin Hood's Bay, UK: ammonite faunas and isotope stratigraphy (vol 137, pg 604, 2000)
Sp. Hesselbo et al., A potential global stratotype for the Sinemurian-Pliensbachian boundary (Lower Jurassic), Robin Hood's Bay, UK: ammonite faunas and isotope stratigraphy (vol 137, pg 604, 2000), GEOL MAG, 138(2), 2001, pp. 235-236