@inbook{bitzer2001superdirective,
 author = {Bitzer, J. and Simmer, K. U.},
 title = {Superdirective microphone arrays},
 publisher = {Springer Berlin Heidelberg},
 tags = {Microphone-Arrays, Noise Reduction},
 booktitle = {Microphone arrays},
 year = {2001},
 pages = {19-38},
}