http://www.cqvip.com/main/confirm.aspx?id=4889248
维普网
全网免费
http://manu39.magtech.com.cn/Geophy/CN/article/downloadArticleFile.do?attachType=PDF&id=3574
manu39.magtech.com.cn
全网免费
http://www.researchgate.net/profile/Hong_Liu22/publication/264255783_Hamiltonian_Description_of_Seismic_Wave_Propagation_and_Symplectic_Method/links/563b44f508ae45b5d2860645/Hamiltonian-Description-of-Seismic-Wave-Propagation-and-Symplectic-Method.pdf
ResearchGate
全网免费
http://doc.paperpass.com/journal/20010127dqwlxb.html
doc.paperpass.com
全网免费
http://search.cnki.net/down/default.aspx?filename=DQWX200101013&dbcode=CJFD&year=2001&dflag=pdfdown
search.cnki.net
全网免费