Bruce S. Lieberman (1 Jul 2002). "Phylogenetic Analysis Of Some Basal Early Cambrian Trilobites, The Biogeographic Origins Of The Eutrilobita, And The Timing Of The Cambrian Radiation". Journal of Paleontology (بالإنجليزية). 76 (4): 692–708. DOI:10.1666/0022-3360(2002)076<0692:PAOSBE>2.0.CO;2. ISSN:0022-3360. QID:Q13847780.
Bruce S. Lieberman (1 Jul 2002). "Phylogenetic Analysis Of Some Basal Early Cambrian Trilobites, The Biogeographic Origins Of The Eutrilobita, And The Timing Of The Cambrian Radiation". Journal of Paleontology (بالإنجليزية). 76 (4): 692–708. DOI:10.1666/0022-3360(2002)076<0692:PAOSBE>2.0.CO;2. ISSN:0022-3360. QID:Q13847780.
worldcat.org
Bruce S. Lieberman (1 Jul 2002). "Phylogenetic Analysis Of Some Basal Early Cambrian Trilobites, The Biogeographic Origins Of The Eutrilobita, And The Timing Of The Cambrian Radiation". Journal of Paleontology (بالإنجليزية). 76 (4): 692–708. DOI:10.1666/0022-3360(2002)076<0692:PAOSBE>2.0.CO;2. ISSN:0022-3360. QID:Q13847780.