A Framework for DNSSEC Policies and DNSSEC Practice Statements. - Fredrik Ljunggren; Anne-Marie Eklund Löwinder; Tomofumi Okubo (RFC, 2013)

Railway timetabling: a maximum bottleneck path algorithm for finding an additional train path. - Fredrik Ljunggren; Kristian Persson; Anders Peterson; Christiane Schmidt 001 (Public Transp., 2021)

The Base45 Data Encoding. - Patrik Fältström; Fredrik Ljunggren; Dirk-Willem van Gulik (RFC, 2022)