Kivelä, I., Gao, C., Luomala, J., Ihalainen, J., & Hakala, I. (2011). Design of Networked Low-Cost Wireless Noise Measurement Sensor. Sensors & Transducers journal, Vol. 10, 171-190. http://www.sensorsportal.com/HTML/DIGEST/Special_Issue_Feb_2011.htm
Hakala, I., Ihalainen, J., Kivelä, I., & Tikkakoski, M. (2010). Evaluation of Environmental Wireless Sensor Network - Case Foxhouse. International Journal on Advances in Networks and Services, 3 (2010)(1-2). http://www.iariajournals.org/networks_and_services/index.html
Hakala, I., Kivelä, I., Ihalainen, J., Luomala, J., & Gao, C. (2010). Design of Low-Cost Noise Measurement Sensor Network: Sensor Function Design. In The First International Conference on Sensor Device Technologies and Applications (pp. 172-179). https://doi.org/10.1109/sensordevices.2010.39