Long-term activity of the bursting x-ray pulsar GRO J1744-28 from Konus-Wind and Konus-A observations Aptekar, R. L. ; Butterworth, P. S. ; Golenetskii, S. V. ; Il'Inskii, V. N. ; Cline, T. L. ; Mazets, E. P. ; Stillwell, D. E. ; Terekhov, M. M. ; Frederiks, D. D. Abstract Publication: Astronomy Letters Pub Date: March 1997 Bibcode: 1997AstL...23..147A