Lie Derivatives, Killing΄s Equations GegenBauer Polynomials: A Combined Use for the Evaluation of some Useful Integrals N. Spyrou (1978) Δελτίο της Ελληνικής Μαθηματικής Εταιρίας
Lie theory and certain identities satisfied by p F p Wong, C.F., Narain Kesarwani, R. (1975) Portugaliae mathematica