TY - JOUR AU - Rosalba Perna AU - E. Bozzo AU - L. Stella BT - The Astrophysical Journal DA - 03/2006 DO - 10.1086/499227 PY - 2006 SP - 363 EP - 376 T2 - The Astrophysical Journal TI - On the Spin-up/Spin-down Transitions in Accreting X-Ray Binaries VL - 639 SN - 0004-637X ER -