Chris Hefford

Ribosomal DNA sequence comparison of Babesia and Theileria.

B. Dalrymple, A. Johnson, J. Ellis, 1992, Molecular and biochemical parasitology.

Contributions to the phylogeny of Platyhelminthes based on partial sequencing of 18S ribosomal DNA.

K. Rohde, A. Johnson, J. Ellis, 1993, International journal for parasitology.