** RFM Analiz etme kütüphanesi https://productphilosophy.com/rfm-analizi-nedir-ve-nasil-yapilir/ https://www.cloudyflex.com/blogs/post/zoho-crm-rfm-segmentasyonu-nedir https://rstudio-pubs-static.s3.amazonaws.com/485897_8ea8c97e33a24eafa15a095c3364a6d0.html https://rfm.rsquaredacademy.com/ https://rpubs.com/omerperach/RFM_IDC