Cuti Patisandhi citta

The concept of cuti patisandhi cittas- i.e. generation of patisandhi citta conditioned by cuti citta in a minute fraction of a second- is a very important concept mentioned in Abhidhammaththa Sangaha. This is so important that only by describing the mechanism of cuti-patisandhi in this way the main teaching of Buddhism that there is no soul or ego (anatta) can be justified. Can I find any reference in Abhidhamma Pitaka.