Laas, Tonu Propagation of waves in curved spacetimes / T. Laas. - Tartu : Tartu Univ. Press, 2002. - 176 p. - Diss. Philos. Univ. Tartuensis; 38 . Includes bibliogr. references ISBN: 9985566831 Subjects--Topical Terms: Theory of meaningPhysicsWave equation