On mechanical resonances and anti-resonances
... operations associated with the preparation and solution of differential equations have been replaced by simple algebraic transformations. The method is based on the mechanical analogue of Ohm's law in a complex representation and the concept of mechanical reactance, resistance, impedance, susceptance, conductance and admittance.
Popov I. P.
reactance, resistivity, impedance, susceptance, conductance, admittance
79-94