Authors: Butterfield, NJ

Citation: Nj. Butterfield, Paleobiology of the late Mesoproterozoic (ca. 1200 Ma) Hunting Formation, Somerset Island, arctic Canada, PRECAMB RES, 111(1-4), 2001, pp. 235-256

Authors: Samuelsson, J Butterfield, NJ

Citation: J. Samuelsson et Nj. Butterfield, Neoproterozoic fossils from the Franklin Mountains, northwestern Canada: stratigraphic and palaeobiological implications, PRECAMB RES, 107(3-4), 2001, pp. 235-251

Authors: Budd, GE Butterfield, NJ Jensen, S

Citation: Ge. Budd et al., Crustaceans and the "Cambrian explosion", SCIENCE, 294(5549), 2001, pp. NIL_1-NIL_1

Authors: Lazcano, A Farmer, JD Buick, R Logan, GA Summons, RE Erwin, DH Morris, SC Butterfield, NJ Smith, MP Sansom, IJ Miller, AI Long, JA Wood, RA Edwards, D Scheckler, SE Selden, PA Coates, MI Dimichele, WA Labandeira, CC Hopson, JA Kelley, PH Hansen, TA Friis, EM Pedersen, KR Crane, PR Chiappe, LM Cerling, TE Janis, CM Collinson, ME Rose, KD Wood, BA Aiello, LC

Citation: A. Lazcano et al., Major events in the history of life, PALAEOBIOLOGY II, 2001, pp. 3-130

Authors: Butterfield, NJ

Citation: Nj. Butterfield, Ecology and evolution of Cambrian plankton, PERS PALEOB, 2001, pp. 200-216

Authors: Butterfield, NJ

Citation: Nj. Butterfield, Bangiomorpha pubescens n. gen., n. sp.: implications for the evolution of sex, multicellularity, and the Mesoproterozoic/Neoproterozoic radiation of eukaryotes, PALEOBIOL, 26(3), 2000, pp. 386-404