The work of Barba et al.  is fatally flawed on two counts: (i) the existence of Tellegen mediums is unrecognizable in modern electromagnetic theory, and (ii) the time-domain constitutive relations used in the commented upon work are noncausal.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering