1. Biometrics and biometric data: What is it and is it secure? Us.norton.com. https://us.norton.com/internetsecurity-iot-biometrics-how-do-they-work-are-they-safe.html. Accessed 26 Jan 2021
2. Physical Access Control Biometrics - FindBiometrics. In: FindBiometrics. https://findbiometrics.com/applications/physical-access-control/. Accessed 26 Jan 2021
3. Speaker recognition in Azure.micosoft.com. https://azure.microsoft.com/en-us/services/cognitive-services/speaker-recognition/. Accessed 26 Jan 2021
4. Amazon Transcribe. In: Docs.aws.amazon.com. https://docs.aws.amazon.com/transcribe/latest/dg/how-diarization.html. Accessed 26 Jan 2021
5. Juang, B.H., Rabiner, L.R.: Automatic Speech Recognition – A Brief History of the Technology Development. Georgia Institute of Technology, Atlanta (2004). https://www.ece.ucsb.edu/Faculty/Rabiner/ece259/Reprints/354_LALI-ASRHistory-final-10-8.pdf