1. M Cyrot and D Pavuna, Introduction to superconductivity and high-T c materials (World Scientific, 1992), the new edition is currently being prepared See also J Bok, G Deutscher, D Pavuna, S A Wolf (eds), The gap symmetry and fluctuations in high-Tc superconductors (NATO B371, Kluwer-Plenum, 1998)
2. D W Lynch and C G Olsen, Photoemission studies on high temperature superconductors (Cambridge Univ. Press, 1999) ISBN 0 521 55189
3. J C Campuzano et al, CM0209476
4. Karl Alex Mueller, personal communications (2006) In contrast, see P W Anderson, Nature Phys. 2, 626 (2006) or the whole issue Nature Phys. — 20 years of HTSC (March 2006)
5. G Baskaran, personal communication, Kanpur (2006), also CM9910161v1