Dentzien-Dias, P.C. & Poinar, G. & de Figueiredo, A.E.Q. & Pacheco, A.C.L. & Horn, B.L.D. & Schultz, C.L. (2013)
Tapeworm Eggs in a 270 Million-Year-Old Shark Coprolite. PLoS ONE, 8(1), Article e55007
DOI: 10.1371/journal.pone.0055007