X-ray counterpart of the shortest activity cycle found to date

X-ray Counterparts of Be Gamma-ray Binary Candidates

X-ray Counterparts of TeV Sources Newly Discovered with H.E.S.S.

X-Ray Counterparts to Radio Transients

X-ray cross-correlation analysis and local symmetries of disordered systems. I. General theory

X-ray cross-correlation analysis applied to disordered two-dimensional systems

X-ray cross-sections and crossroads (The International Radiation Physics Society) - Richard Pratt's contributions to both

X-ray crystallography of large molecules of biological importance

X-ray deflector: theory, design, and applications

X-ray detection of Nova Herculis 1991 five days after optical outburst

X-ray detections of comets.

X-Ray Detector Physics and Applications II

X-ray detectors and integrated electronics for x-ray imaging for astronomy

X-ray detectors: a review

X-Ray Determination of Cosmological Parameters

X-Ray Determination of Cosmological Parameters, Part II

X-Ray Diagnostics of Acceleration Processes

X-ray Diagnostics of Astrophysical Plasmas: Theory, Experiment, and Observation

X-ray diagnostics of grain depletion in matter accreting onto T Tauri stars

X-ray diagnostics of pre-main sequence accretion and outflow activity