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APA Citation
Luo, K., Herrmann, H., Krapick, S., Brecht, B., Ricken, R., Quiring, V., Suche, H., Sohler, W., & Silberhorn, C. (n.d.). direct generation of genuine single-longitudinal-mode narrowband photon pairs. New journal of physics, 17, 145–95. http://access.bl.uk/ark:/81055/vdc_100026393189.0x00005b