This document discusses text summarization techniques. It introduces TextRank, an algorithm that ranks sentences based on their importance by treating them as nodes in a graph and using a method similar to PageRank. It then describes Summariz3, a TextRank implementation, and Textrankr, an R package for TextRank summarization with a GitHub source code link provided. Finally, it lists references for further information on TextRank and other neural network approaches to summarization.