Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts
G.M. Grosjean, S.R. Waitukaitis, Physical Review Materials 7 (2023).

Quantitatively consistent scale-spanning model for same-material tribocharging
G.M. Grosjean, S. Wald, J.C.A. Sobarzo Ponce, S.R. Waitukaitis, Physical Review Materials 4 (2020).