Ballesteros, J.A.; Sharma, P.P. "A Critical Appraisal of the Placement of Xiphosura (Chelicerata) with Account of Known Sources of Phylogenetic Error". Systematic Biology. 68 (6). 2019: 896–917. doi:10.1093/sysbio/syz011. PMID30929988.
Ballesteros, J.A.; Sharma, P.P. "A Critical Appraisal of the Placement of Xiphosura (Chelicerata) with Account of Known Sources of Phylogenetic Error". Systematic Biology. 68 (6). 2019: 896–917. doi:10.1093/sysbio/syz011. PMID30929988.