@article{RiaT13, author = {R. Riaza and C. Tischendorf}, title = {Structural characterization of classical and memristive circuits with purely imaginary eigenvalues}, journal = {Int. J. Circ. Theor. Appl.}, year = {2013}, volume = {41}, pages = {273--294}, doi = {10.1002/cta.798} }