(en) S. Pancharatnam, « Generalized Theory of Interference, and Its Applications. Part I. Coherent Pencils », Proc. Indian Acad. Sci. A, vol. 44, no 5, , p. 247-262 (DOI10.1007/BF03046050, S2CID118184376).
(en) S. Pancharatnam, « Generalized Theory of Interference, and Its Applications. Part I. Coherent Pencils », Proc. Indian Acad. Sci. A, vol. 44, no 5, , p. 247-262 (DOI10.1007/BF03046050, S2CID118184376).
(en) S. Pancharatnam, « Generalized Theory of Interference, and Its Applications. Part I. Coherent Pencils », Proc. Indian Acad. Sci. A, vol. 44, no 5, , p. 247-262 (DOI10.1007/BF03046050, S2CID118184376).
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(en) S. Pancharatnam, « Generalized Theory of Interference, and Its Applications. Part I. Coherent Pencils », Proc. Indian Acad. Sci. A, vol. 44, no 5, , p. 247-262 (DOI10.1007/BF03046050, S2CID118184376).
(en) S. Pancharatnam, « Generalized Theory of Interference, and Its Applications. Part I. Coherent Pencils », Proc. Indian Acad. Sci. A, vol. 44, no 5, , p. 247-262 (DOI10.1007/BF03046050, S2CID118184376).
(en) S. Pancharatnam, « Generalized Theory of Interference, and Its Applications. Part I. Coherent Pencils », Proc. Indian Acad. Sci. A, vol. 44, no 5, , p. 247-262 (DOI10.1007/BF03046050, S2CID118184376).