F. Wang, M. Ruderman, J. P. Halpern, and T. Zhu, "Models for X-ray emission from isolated pulsars," Astrophysical Journal, 498, 373--384 (1998).

F. Wang and J. P. Halpern, "ASCA observations of PSR 1929+10 and PSR 0950+08," Astrophysical Journal, 482, L159-L162 (1997).

J. P. Halpern and F. Wang, "A broaband X-ray study of the Geminga pulsar," Astrophysical Journal, 477, 905--915 (1997).