出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：This is a short and biased review of gravitational lensing with emphasis on the radio and especially
VLBI aspects. We briefly explain the basic idea and give a short sketch of the discovery of the
first lens before we more systematically discuss the general fields that can be studied with lensing.
We intentionally omit the details the average lensing expert would like to see and instead try to
give a very general overview addressed to the radio astronomer working in some other field. The
lens B0218+357 is presented as an example to show many aspects of lensing in a case that already
has led to interesting results but still has additional potential for the future.
