Fourier transform of a gaussian measure on the Heisenberg group Mátyás Barczy; Gyula Pap — 2006 Annales de l'I.H.P. Probabilités et statistiques
Maximum likelihood estimator of the volatility of forward rates driven by geometric spatial AR sheet. Gáll, József; Pap, Gyula; Van Zuijlen, Martien C.A. — 2004 Journal of Applied Mathematics