The widely linear block quaternion least mean square algorithm for fast computation in 3D audio systems. - Francesca Ortolani; Danilo Comminiello; Aurelio Uncini (MLSP, 2016)

Frequency-Domain Adaptive Filtering in Hypercomplex Systems. - Francesca Ortolani; Danilo Comminiello; Michele Scarpiniti; Aurelio Uncini (Advances in Neural Networks, 2016)

Frequency domain quaternion adaptive filters: Algorithms and convergence performance. - Francesca Ortolani; Danilo Comminiello; Michele Scarpiniti; Aurelio Uncini (Signal Process., 2017)

Hypercomplex adaptive filtering. - Francesca Ortolani (2018)

On 4-Dimensional Hypercomplex Algebras in Adaptive Signal Processing. - Francesca Ortolani; Danilo Comminiello; Michele Scarpiniti; Aurelio Uncini (Neural Advances in Processing Nonlinear Dynamic Signals, 2020)