If you are studying electrical engineering, specifically wireless communications, you have almost certainly encountered the "golden bible" of the field: Wireless Communications: Principles and Practice by Theodore S. Rappaport.
Cellular Concept: How to calculate frequency reuse factors and system capacity. Cellular Concept: How to calculate frequency reuse factors
When you are staring at a problem regarding the "co-channel interference reduction factor" at 2:00 AM, a solution manual feels like a lifeline. performs better at low SNR.
For instance: