Shen, G., Y. Guo, X. Sun, and X. Wang. “Electrochemical Aptasensor Based on Prussian Blue-Chitosan-Glutaraldehyde for the Sensitive Determination of Tetracycline”. Nano-Micro Letters, vol. 6, no. 2, Mar. 2014, pp. 143-52, doi:10.1007/BF03353778.