@other{https://resolver.caltech.edu/CaltechEERL:1975.EERL-75-03,
    title = "The Steady-state response of multidegree-of-freedom systems with a spatially localized nonlinearity",
    url = "https://resolver.caltech.edu/CaltechEERL:1975.EERL-75-03",
    id = "record"
}