Bucefalo Palliani and Riding, 2000
From dinoflaj3
Bucefalo Palliani, R. and Riding, J.B., 2000: A palynological investigation of the Lower and lowermost Middle Jurassic strata (Sinemurian to Aalenian) from North Yorkshire, UK. Proceedings of the Yorkshire Geological Society, v.53, pt.1, p.1-16.