Timothy Rowe, “Phylogenetic Systematics and the Early History of Mammals,” In: Frederick S. Szalay, Michael J. Novacek & Malcolm C. McKenna (eds.), Mammal Phylogeny: Mesozoic Differentiation, Multituberculates, Monotremes, Early Therians, and Marsupials Springer-Verlag, 1993, Pages 129-145.