@ARTICLE{Sikora_A._The_2012, author={Sikora, A. and Bednarz, Ł.}, volume={60}, number={No 1}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={83-88}, howpublished={online}, year={2012}, title={The implementation and the performance analysis of the multi-channel software-based lock-in amplifier for the stiffness mapping with atomic force microscope (AFM)}, URL={http://www.journals.pan.pl/Content/83484/PDF/12_paper.pdf}, doi={10.2478/v10175-012-0012-y}, }