Formation Mechanisms of IMBH in Globular Clusters
  We very briefly discuss proposed in the literature possible scenarios for intermediate mass black holes (IMBH) formation in globular clusters. We also discuss the results of the MOCCA simulations of about 2000 models (BigSurvey) regarding the distribution of events connected with electromagnetic and gravitational radiations, namely: mass transfer on IMBH, collisions and mergers with IMBH and mergers with IMBH due to gravitational radiation. The rates of these events are very small, so their observation is very improbable. 
Mirek Giersz, Nathan Leigh, Arkadiusz Hypki, Abbas Askar and Nora   L\"utzgendorf
astro-ph.GA