岳静. 二阶线性常微分方程组的指标理论及其应用[J]. 浙江大学学报(理学版), 2014, 41(2): 132-137.
YUE Jing. Index theory for linear second order ordinary differential systems and applications. Journal of Zhejiang University (Science Edition), 2014, 41(2): 132-137.
https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2014.02.003 或 https://www.zjujournals.com/sci/CN/Y2014/V41/I2/132
Cited