@article{
 title = {The effective period and damping of a class of hysteretic structures},
 type = {article},
 year = {1979},
 identifiers = {[object Object]},
 pages = {199-211},
 volume = {7},
 id = {edae2d2c-1608-303d-a11f-ae86cf869d92},
 created = {2017-05-12T08:30:56.573Z},
 file_attached = {false},
 profile_id = {dd7220fd-7458-3c83-a8de-576e82421d0e},
 group_id = {fb736a4d-bfc6-38f5-9312-b6487188b71f},
 last_modified = {2017-05-16T06:48:41.445Z},
 read = {true},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Iwan1979},
 source_type = {article},
 bibtype = {article},
 author = {Iwan, Wilfred D and Gates, Nathan C},
 journal = {Earthquake Engineering and Structural Dynamics},
 number = {3}
}