Guideline 5/1993 from the Danish Agency of Environmental Protection“Calculation of environmental noise from industries” (in Danish)
2.
Orientation from the Danish Agency of Environmental Protection nr xx/1997“Low Frequency Noise, Infra Sound and Vibrations in the Environment” to be published (in Danish)
3.
“Evaluation of low frequency noise from ferries – 2” Work report nr 10/1997 from the Danish Agency of Environmental Protection (in Danish)