p.1
* Xe spectrum - https://en.wikipedia.org/wiki/Xenon
* fcc lattice - https://en.wikipedia.org/wiki/Cubic_crystal_system
* Xe band structure - Reilly '67, doi: 10.1016/0022-3697(67)90183-7 

p.2
* GaAs band structure - Vurgaftman et al. '01: doi: 10.1063/1.1368156 
* bcc Fe band structure - Yao et al. '04: doi: 10.1103/PhysRevLett.107.106601

p.3 
* turbulent flow - http://abyss.uoregon.edu/~js/images/turbulent_flow.gif
* spin Seebeck exp. - Seki et al. '15: doi: 10.1103/PhysRevLett.115.266601

p.4,5
* photo of Hall bar - Vyborny '10: Cs. cas. fyz. 60, 147 (2010). No doi.
* high temp. - just a sketch
* low temp. - measurement @FZU by L. Nadvornik

p.10
* sketch of a heterostr. - en.wikipedia.org/wiki/Two-dimensional_electron_gas
* InAs/AlSb superlattice - www1.mpi-halle.mpg.de/~md_simul/MDres1.html
  citation given at that page: physica status solidi (a) 150 (1995) 471-478

p.11
* right (STO/LAO etc.) - Hwang et al. '12: doi: 10.1038/nmat3223
* left (ZnO/MgZnO) - Tsukazaki et al. '10: doi: 10.1038/nmat2874

p.12
* electrons on liquid He - PRL 106, 026803
* electrons on H-passivated Si - PRL 99, 016801

p.13
* graphene IC - Lin et al. '11: doi: 10.1126/science.1204428

p.14
* CNT exp - Frank et al. '98: doi: 10.1126/science.280.5370.1744
* CEO wire - Pfeiffer et al. '97: doi: 10.1016/S0026-2692(96)00120-6

p.15
* Mn-doped QDs - Beaulac et al. '09: doi: 10.1126/science.1174419
* rainbow colours - Celso de Mello Donega '11: doi: 10.1039/C0CS00055H