Nejad et al., 1999
From dinoflaj3
Nejad, E.G., Sarjeant, W.A.S. and Gygi, R., 1999: Palynology and paleoenvironment of the uppermost Bathonian and Oxfordian (Jurassic) of the northern Switzerland sedimentary basin. Schweizerische Paläontologische Abhandlungen, v.119, 69 p., 29 pl.