S. R. Soummer; et al. (2009). Shaklan, Stuart B. (ed.). "The Gemini Planet Imager coronagraph testbed". Proc. SPIE 7440 Techniques and Instrumentation for Detection of Exoplanets IV. Techniques and Instrumentation for Detection of Exoplanets IV. 7440: 74400R. Bibcode:2009SPIE.7440E..0RS. doi:10.1117/12.826700. S2CID122904075.
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S. R. Soummer; et al. (2009). Shaklan, Stuart B. (ed.). "The Gemini Planet Imager coronagraph testbed". Proc. SPIE 7440 Techniques and Instrumentation for Detection of Exoplanets IV. Techniques and Instrumentation for Detection of Exoplanets IV. 7440: 74400R. Bibcode:2009SPIE.7440E..0RS. doi:10.1117/12.826700. S2CID122904075.
S. R. Soummer; et al. (2009). Shaklan, Stuart B. (ed.). "The Gemini Planet Imager coronagraph testbed". Proc. SPIE 7440 Techniques and Instrumentation for Detection of Exoplanets IV. Techniques and Instrumentation for Detection of Exoplanets IV. 7440: 74400R. Bibcode:2009SPIE.7440E..0RS. doi:10.1117/12.826700. S2CID122904075.