Queirós, Raquel B., João P. Noronha, Paulo V. S. Marques, João S. Fernandes, and Goreti M. F. Sales. "Determination of Microcystin-LR in Waters in the Subnanomolar Range by sol-gel Imprinted Polymers on Solid Contact Electrodes." Analyst. 137 (2012): 2437-2444.