There has been a lot of discussion over whether or not training volume is important for hypertrophy and strength as well as the potential for injury. I address these issues as well as my own experience.
Multi-set training superior to single set for strength & hypertrophy: https://www.ncbi.nlm.nih.gov/pubmed/23249767
Dose dependant response of training volume on hypertrophy & strength: https://www.ncbi.nlm.nih.gov/pubmed/25546444
Low load produces similar hypertrophy to high intensity: https://www.ncbi.nlm.nih.gov/pubmed/22518835
Volume associated with hypertrophy more than intensity:
Training twice a week superior to once per week even with volume equated: https://www.ncbi.nlm.nih.gov/pubmed/27102172
Volume increases CSA more than intensity:
Meta-analysis: dose response of volume/set number on hypertrophy: https://www.ncbi.nlm.nih.gov/pubmed/20300012