A digital filterbank hearing aid-design, implementation and evaluation. - Thomas Lunner; Johan Hellgren (ICASSP, 1991)

Bias of feedback cancellation algorithms based on direct closed loop identification. - Johan Hellgren; Urban Forssell (ICASSP, 2000)

Bias of feedback cancellation algorithms in hearing aids based on direct closed loop identification. - Johan Hellgren; Urban Forssell (IEEE Trans. Speech Audio Process., 2001)

Analysis of feedback cancellation in hearing aids with Filtered-x LMS and the direct method of closed loop identification. - Johan Hellgren (IEEE Trans. Speech Audio Process., 2002)