Alfred Geroldinger & Franz Halter-Koch 
Non-Unique Factorizations [PDF ebook] 
Algebraic, Combinatorial and Analytic Theory

From its origins in algebraic number theory, the theory of non-unique factorizations has emerged as an independent branch of algebra and number theory. Focused efforts over the past few decades have wrought a great number and variety of results. However, these remain dispersed throughout the vast literature. For the first time, Non-Unique Factoriza