Nestor, H., Nestor, V. 2002.
Upper Llandovery to middle Wenlock (Silurian) lithostratigraphy and chitinozoan biostratigraphy in southwestern Estonia and northermost Latvia.Proceedings of the Estonian Academy of Sciences. Geology51,
2,67-87.
Nestor, V. 1999.
Distribution of chitinozoans in the Llandovery of the Oslo region.Bolletino della Societa Paleontologica Italiana38,
2-3,227-238.
Nestor, V. 1994.
Early Silurian chitinozoans of Estonia and North Latvia.