Systems of First-Order Differential Equations and Higher-Order Differential Equations
1959 ◽
Vol 10
(6)
◽
pp. 936-936
◽
2000 ◽
Vol 50
(1)
◽
pp. 155-173
◽
Keyword(s):
2018 ◽
Vol 38
(2)
◽
pp. 74-84
◽