Nikola, T., Stacey, G. J., Brisbin, D., Ferkinhoff, C., Hailey-Dunsheath, S., Parshley, S., & Tucker, C. (2011). Mid-J CO emission from NGC 891: microturbulent molecular shocks in normal star-forming galaxies. The Astrophysical Journal, 742(2):, pp. 1-8. doi:10.1088/0004-637X/742/2/88.