UV (IUE) spectra of the central stars of high latitude planetary nebulae Hb7 and Sp3 G. Gauba, M. Parthasarathy, Y. Nakada and T. Fujii A&A, 373 2 (2001) 572-575 Published online: 15 July 2001 DOI: 10.1051/0004-6361:20010623