Matrix elements and highest weight Wigner coefficients of GL(n,ℂ)
Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 36 (1982) no. 3, pp. 225-237. 
@article{AIHPA_1982__36_3_225_0,
     author = {Klink, W. H. and Ton-That, T.},
     title = {Matrix elements and highest weight {Wigner} coefficients of $GL (n, \, \mathbb {C})$},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {225--237},
     publisher = {Gauthier-Villars},
     volume = {36},
     number = {3},
     year = {1982},
     mrnumber = {664634},
     zbl = {0488.22041},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1982__36_3_225_0/}
}
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Klink, W. H.; Ton-That, T. Matrix elements and highest weight Wigner coefficients of $GL (n, \, \mathbb {C})$. Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 36 (1982) no. 3, pp. 225-237. http://archive.numdam.org/item/AIHPA_1982__36_3_225_0/

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[2] A.U. Klimyk, Lett. Math. Phys., t. 3, 1979, p. 315. | MR | Zbl

[3] W.H. Klink and T. Ton-That, Ann. Inst. H. Poincaré, Ser. A, t. 31, 1979. p. 77-79. | Numdam | Zbl

[4] W.H. Klink and T. Ton-That, C. R. Acad. Sci., Ser. B, t. 289, 1979, p. 115-118.

[5] L.C. Biedenharn and J.D. Louck, Comm. Math. Phys., t. 8, 1968, p. 89; M.K.F. Wong, J. Math. Phys., t. 20, 1979, p. 2391, and references cited therein. It should be noted in these references the multiplicity free Wigner coefficients are computed inductively. | MR

[6] Hou Pei-Yu, Scientia Sinica, t. 15, n° 6, 1966, p. 763-772. | MR | Zbl

[7] W.H. Klink and T. Ton-That, Ann. Inst. H. Poincaré, Ser. A, t. 31, 1979, p. 99-113. | Numdam | MR | Zbl