Strong, A. W., Bouchet, L., Diehl, R., Mandrou, P., Schönfelder, V., & Teegarden, B. J. (2003). Diffuse continuum emission from the inner Galaxy: First results from INTEGRAL/SPI. Astronomy & Astrophysics, 411(1), L447-L450. doi:10.1051/0004-6361:20031256.