Notes on correlation femtoscopy

The particle correlations at small relative velocities are sensitive to the space-time characteristics of the production processes on a femtometer scale owing to the effects of quantum statistics and finalstate interaction. Though the final-state interaction complicates the correlation analysis, it is an important source of information allowing for coalescence femtoscopy, correlation femtoscopy with unlike particles including access to the relative space-time asymmetries in particle production, and a study of strong interactions between specific particles. I will briefly discuss the history and basics of correlation femtoscopy, some of the recent results from femtoscopy of relativistic heavy-ion collisions, and their consequences.