TY - RPRT TI - Two-dimensional x-ray waveguides and point sources. AU - F Pfeiffer AU - C David AU - M Burghammer AU - C Riekel AU - T Salditt PY - 2002 DO - 10.1126/science.1071994 UR - https://pubmed.ncbi.nlm.nih.gov/12114620/ ID - 12114620 ER -