Strong, A. W., Diehl, R., Halloin, H., Schönfelder, V., Bouchet, L., Mandrou, P., Teegarden, B. J., Lebrun, F., & Terrier, R. (2004). SPI measurements of the diffuse galactic hard X-ray continuum. In B., Battrick (Ed.), INTEGRAL Science Workshop (pp. 507-511). Noordwijk, Netherlands: ESA Publications Division.