Pure Appl. Chem., 1989, Vol. 61, No. 9, pp. 1613-1618
doi:10.1351/pac198961091613
Carriers for chemical sensors: Design features of optical sensors (optodes) based on selective chromoionophores
W. E. Morf, K. Seiler, B. Lehmann, C. Behringer, K. Hartman and W. Simon