C. C.  Labandeira, ?Recent approaches in using plant-insect associational data: quantifying and qualifying the past?, in Ichnia 2004, First International Congress on Ichnology, April 19-23, 2004, Museo Paleontólogico Egidio Feruglio, Trelew, Patagonia, Argentina. Abstract Book, L. A.  Buatois, Ed. 2004, p. 6.