I N Bernstein et al 1973 Russ. Math. Surv. 28 17 doi:10.1070/RM1973v028n02ABEH001526
I N Bernstein, I M Gel'fand and V A Ponomarev
I N Bernstein et al 1973 Russ. Math. Surv. 28 17
Neil Turok and Paul J Steinhardt 2005 Phys. Scr. 2005 76
J T Chalker and P D Coddington 1988 J. Phys. C: Solid State Phys. 21 2665
Reinabelle Reyes et al. 2008 The Astronomical Journal 136 2373
Ilana Perelshtein et al 2008 Nanotechnology 19 245705
Ho-Cheol Kim et al 2008 Nanotechnology 19 235301
Zhao Qin et al 2009 Nanotechnology 20 425101
A I Rahachou and I V Zozoulenko 2007 J. Opt. A: Pure Appl. Opt. 9 265
Daan Wouters and Ulrich S Schubert 2007 Nanotechnology 18 485306
F Massuyeau et al 2009 Nanotechnology 20 155701