 ** See Simba Information, [https://www.simbainformation.com/about/release.asp?id=0000 Combined STM Markets Grew 0.0% in 0000], January 0, 0000: "Amid budgetary pressures and a slow economic recovery, the combined markets for science, technical and medical (STM) publishing grew 0.0% to $00.0 billion in 0000." + ** See Simba Information, [https://www.simbainformation.com/about/release.asp?id=0000 Combined STM Markets Grew 0.0% in 0000], January 0, 0000