Geodesic
Representations of Gelfand--Graev type for the unitriangular group
Fundamentalʹnaâ i prikladnaâ matematika, Tome 18 (2013) no. 3, pp. 161-178.

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We consider the analog of Gelfand–Graev representations for the unitriangular group. We obtain the decomposition into a sum of irreducible representations, prove that these representations are multiplicity free, and calculate the Hecke algebra. 
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A. N. Panov. Representations of Gelfand--Graev type for the unitriangular group. Fundamentalʹnaâ i prikladnaâ matematika, Tome 18 (2013) no. 3, pp. 161-178. http://geodesic.mathdoc.fr/item/FPM_2013_18_3_a10/

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