Sigma Worksheet: Interactive Construction of OLAP Queries. - James Gale; Max Seiden; Çagatay Demiralp (CoRR, 2020)

Sigma Workbook: A Spreadsheet for Cloud Data Warehouses. - James Gale; Max Seiden; Deepanshu Utkarsh; Jason Frantz; Rob Woollen; Çagatay Demiralp (Proc. VLDB Endow., 2022)