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GlossarySources" with value "http://www.unescochair-hhf.ro/uploads/uploads/Daniela_Dragoman_Photovoltaics_4.pdf (0.); https://en.wikipedia.org/wiki/Multi-junction_solar_cell (1.); http://spie.org/newsroom/5201-better-measurement-of-multijunction-solar-cell-efficiency (2.)"