Recursion method and one-hole spectral function of the Majumdar-Ghosh model R. O. Kuzian, R. Hayn and J. Richter Eur. Phys. J. B, 35 1 (2003) 21-31 Published online: 22 September 2003 DOI: 10.1140/epjb/e2003-00252-x