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https://www.hamamatsu.com/resources/pdf/etd/PMT_handbook_v3aE.pdf
. Accessed 23 April 2014
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http://www.hamamatsu.com/resources/pdf/etd/m-h7422e.pdf
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3. PMA series photomultiplier detector assembly. PicoQuant.
http://www.picoquant.com/images/uploads/downloads/pma_series.pdf
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4. Grosenick D (2014) Photon counting in diffuse optical imaging. In: Kapusta P et al. (eds) Advanced photon counting: applications, methods, instrumentation. Springer series on fluorescence. Springer International Publishing, doi:
10.1007/4243_2014_74
5. Microchannel plate-photomultiplier tube (MCP-PMTs) R3809U-50 series. Hamamatsu.
http://www.hamamatsu.com/resources/pdf/etd/R3809U-50_TPMH1067E09.pdf
. Accessed 23 April 2014