An Overview of the Coding Standard MPEG-4 Audio Amendments 1 and 2: HE-AAC, SSC, and HE-AAC v2. - Albertus C. den Brinker; Jeroen Breebaart; Per Ekstrand; Jonas Engdegård; Fredrik Henn; Kristofer Kjörling; Werner Oomen; Heiko Purnhagen (EURASIP J. Audio Speech Music. Process., 2009)

Methods for enhanced harmonic transposition. - Lars F. Villemoes; Per Ekstrand; Per Hedelin (WASPAA, 2011)

Delivering Scalable Audio Experiences using AC-4. - Jeffrey Riedmiller; Kristofer Kjörling; Jonas Roden; Martin Wolters; Arijit Biswas; Prinyar Boon; Tim Carroll; Per Ekstrand; Alexander Gröschel; Per Hedelin; Toni Hirvonen; Holger Horich; et al. (IEEE Trans. Broadcast., 2017)

High Quality Audio Coding with Mdctnet. - Grant A. Davidson; Mark Vinton; Per Ekstrand; Cong Zhou; Lars F. Villemoes; Lie Lu (ICASSP, 2023)

MDCTNet: A Hybrid Approach to Neural Audio Coding. - Lars F. Villemoes; Mark Vinton; Per Ekstrand; Lie Lu; Grant A. Davidson; Cong Zhou (IEEE J. Sel. Top. Signal Process., 2024)