Dr. Stephen Wellum provided a chapter in Believer’s Baptism: Sign of the New Covenant in Christ (Schreiner & Wright) – a version of this chapter can be read online here, entitled, “Baptism and the Relationship Between the Covenants.”
I responded to Dr. Wellum in the following document, taking him to task for his reading of my chapter in The Case for Covenantal Infant Baptism.
This review article is available here (PDF document): BAPTISM AND THE RELATIONSHIP BETWEEN THE COVENANTS by Dr. Stephen J. Wellum – A Review by Gregg Strawbridge, Ph.D.