Drupal-Bibcite0<style face="normal" font="default" size="100%">Testing the No-hair Theorem with Observations in the Electromagnetic Spectrum. I. Properties of a Quasi-Kerr Spacetime</style><style face="normal" font="default" size="100%">Testing the No-hair Theorem with Observations in the Electromagnetic Spectrum. I. Properties of a Quasi-Kerr Spacetime</style>