• Maximum likelihood estimation of nominal direction of arrival and angular spread using an array of sensorsTrump, Tõnu; Ottersten, B.Proceedings COST 229 Final Workshop on Adaptive Systems, Intelligent Approaches, Massively Parallel Computing and Emergent Techniques in Signal Processing and Communications, Oct. 1994, Bayona (Vigo), Spain1994 / p. 77-82 https://www.researchgate.net/publication/2686731_Maximum_Likelihood_Estimation_of_Nominal_Direction_of_Arrival_and_Angular_Spread_Using_an_Array_of_Sensors