no. 1
A rotation invariant differential equation for vector fields
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 9 (1982) no. 1, pp. 159-174. 
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     title = {A rotation invariant differential equation for vector fields},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {159--174},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 9},
     number = {1},
     year = {1982},
     mrnumber = {664106},
     zbl = {0491.35027},
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     url = {http://archive.numdam.org/item/ASNSP_1982_4_9_1_159_0/}
}
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Reimann, H. M. A rotation invariant differential equation for vector fields. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 9 (1982) no. 1, pp. 159-174. http://archive.numdam.org/item/ASNSP_1982_4_9_1_159_0/

[1] L.V. Ahlfors, Invariant operators and integral representations in hyperbolic space, Math. Scand., 36 (1975), pp. 27-43. | MR | Zbl

[2] L.V. Ahlfors, Quasiconformal deformations and mappings in Rn, J. Analyse Math., 30 (1976), pp. 74-97. | MR | Zbl

[3] P. Debye, Zur Theorie der spezifischen Wärmen, Ann. Physik, IV, 39 (1912), pp.789-839. | JFM

[4] A. Korányi, Some applications of Gelfand pairs in classical analysis, CIME, 1980.

[5] A. Korányi - S. Vagi, Group theoretic remarks on Riesz systems in balls, to appear. | Zbl

[6] D.A. Levine, Systems of singular integral operators on spheres, Trans. Amer. Math. Soc., 144 (1969), pp. 493-522. | MR | Zbl

[7] S.G. Mihlin, Higher-dimensional singular integrals and integral equations, Fizmatgiz, Moscow, 1962; English translation: Pergamon Press, New York, 1965. | MR

[8] H. Weyl, Eigenschwingungen eines beliebig gestalteten elastischen Körpers, Rend. Circ. Mat. Palermo, 39 (1915), pp. 1-50 or Selecta Hermann Weyl, Birkhäuser, Basel, 1956. | JFM