Hoover, R.B.; Walker, A. B. C.; Lindblom, J.; Allen, M.; O'Neal, R.; Deforest, C.; Barbee, T. W. (1991). Hoover, Richard B. (ed.). "Solar Observations with the Multi-Spectral Solar Telescope Array". Proc. SPIE. Multilayer and Grazing Incidence X-Ray/EUV Optics. 1546: 175. Bibcode:1992SPIE.1546..175H. doi:10.1117/12.51232. S2CID121924074.
Hoover, R.B.; Walker, A. B. C.; Lindblom, J.; Allen, M.; O'Neal, R.; Deforest, C.; Barbee, T. W. (1991). Hoover, Richard B. (ed.). "Solar Observations with the Multi-Spectral Solar Telescope Array". Proc. SPIE. Multilayer and Grazing Incidence X-Ray/EUV Optics. 1546: 175. Bibcode:1992SPIE.1546..175H. doi:10.1117/12.51232. S2CID121924074.
Hoover, R.B.; Walker, A. B. C.; Lindblom, J.; Allen, M.; O'Neal, R.; Deforest, C.; Barbee, T. W. (1991). Hoover, Richard B. (ed.). "Solar Observations with the Multi-Spectral Solar Telescope Array". Proc. SPIE. Multilayer and Grazing Incidence X-Ray/EUV Optics. 1546: 175. Bibcode:1992SPIE.1546..175H. doi:10.1117/12.51232. S2CID121924074.