Reihe Lecture Notes in PhysicsRichard Brito ×eBooks × SuperradianceNew Frontiers in Black Hole PhysicsRichard BritoSpringer International PublishingeBook2020 SuperradianceEnergy Extraction, Black-Hole Bombs and Implications for Astrophysics and Particle PhysicsRichard BritoSpringer International PublishingeBook2015