ty -jour au -simeonov，plamen py -2000 da -1900/01/01 ti-使用分隔差的sp -730613 vl -5 ab -5 ab -sn -1085-3375 ur -https：// https：// doi。org/10.1155/s1085337500000294 do -10.1155/s1085337500000294 JF-摘要和应用分析PB -Hindawi Publishing Corporation KW -er- ER-