IBM z13: Energy efficiency, increased environmental range, and flexible data center characteristics. - William P. Kostenko; Dustin W. Demetriou; Gary F. Goth (IBM J. Res. Dev., 2015)

IBM z14: Improved datacenter characteristics, energy efficiency, and packaging innovation. - William P. Kostenko; Dustin W. Demetriou; John G. Torok (IBM J. Res. Dev., 2018)

IBM z15: Improved data center density and energy efficiency, new system packaging, and modeling. - William P. Kostenko; John G. Torok; Dustin W. Demetriou (IBM J. Res. Dev., 2020)