Variable-range hopping conductivity in the copper-oxygen chains of La3Sr3Ca8Cu24O41. Phys. Rev. B, (67)18:184521, American Physical Society, May 2003. [PUMA: chains hopping copper-oxygen] URL
Crossover in charge transport from one-dimensional copper-oxygen chains to two-dimensional ladders in (La,Y)y(Sr,Ca)14-yCu24O41. Phys. Rev. B, (78)20:205105, American Physical Society, November 2008. [PUMA: charge chains ladders transport copper-oxygen] URL