@article{ZHANG Huan:29, author = {ZHANG Huan, LI Yong-xiang}, title = {Positive periodic solutions of higher-order ordinary differential equations with delayed derivative terms}, publisher = {JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE)}, year = {2019}, journal = {JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE)}, volume = {54}, number = {4}, eid = {29}, numpages = {7}, pages = {29}, keywords = {differential equation with delay;positive periodic solution;cone;fixed point index}, url = {http://lxbwk.njournal.sdu.edu.cn/EN/abstract/article_3060.shtml}, doi = {10.6040/j.issn.1671-9352.0.2018.258} }