  In this paper, we review the observational properties of two accreting X-ray
pulsars, the persistent source 4U1907+09 and the transient V0332+53. Accreting
X-ray pulsars are among the brightest sources in the X-ray sky and are
frequently observed by Integral and other X-ray missions. Nevertheless they are
still very enigmatic sources as fundamental questions on the X-ray production
mechanism still remain largely unanswered. These questions are addressed by
performing detailed temporal and spectral studies on several objects over a
long time range.
  Of vital importance is the study of cyclotron lines as they provide the only
direct link to the magnetic field of the pulsar. While some objects show
cyclotron lines which are extremely stable with time and with pulse phase, in
other objects the lines strongly depend on the pulse phase, the luminosity of
the source, or both.
  Of special interest in any case are transient sources where it is possible to
study the evolution of the cyclotron line and the source in general from the
onset until the end of the outburst through a wide range of different
luminosity states.
  We present an observational review of a transient and a persistent accreting
X-ray pulsar observed with Integral.
