Mankin, W. G., Coffey, M. T., Goldman, A., Schoeberl, M. R., Lait, L. R., & Newman, P. A. (1990). Airborne measurements of stratospheric constituents over the arctic in the winter of 1989. Geophysical Research Letters, 17, 473-476. doi:10.1029/GL017i004p00473