t-Synopses: A System for Run-Time Management of Remote Synopses. - Yossi Matias; Leon Portman (ICDE, 2004)

Synopses Reconciliation Via Calibration in the tau-Synopses System. - Yariv Matia; Yossi Matias; Leon Portman (EDBT, 2006)

The Design and Architecture of the tau-Synopses System. - Yossi Matias; Leon Portman; Natasha Drukh (EDBT, 2006)

tau-xSynopses - a System for Run-Time Management of XML Synopses. - Natasha Drukh; Yariv Matia; Yossi Matias; Leon Portman (NGITS, 2006)

Use Cases and Requirements for SIP-Based Media Recording (SIPREC). - Ken Rehor; Leon Portman; Andrew Hutton; Rajnish Jain (RFC, 2011)

An Architecture for Media Recording Using the Session Initiation Protocol. - Andrew Hutton; Leon Portman; Rajnish Jain; Ken Rehor (RFC, 2014)

Session Recording Protocol. - Leon Portman; Henry Lum; Charles Eckel; Alan B. Johnston; Andrew Hutton (RFC, 2016)