| Original language | English (US) |
|---|---|
| Pages (from-to) | 449-463 |
| Number of pages | 15 |
| Journal | Journal of Differential Equations |
| Volume | 11 |
| Issue number | 3 |
| DOIs | |
| State | Published - May 1972 |
Bibliographical note
Funding Information:* This research was done while the latter author was visiting at the University of Southern California. It was supported by U.S. Army Contract No. DA-31 124-ARO-D-265 at the University of Southern California and NSF Grant GP-7041 X at the University of Minnesota.
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