 |  | | ACM Computing Reviews |
| | | Cambridge Scientific Abstracts |
| | | Current Contents/Physics, Chemical, & Earth Sciences |
| | | Engineering Index |
| | | INSPEC Information Services |
| | | International Abstracts in Operations Research |
| |
| | | Mathematical Reviews |
| | | PASCAL/CNRS |
| | | Science Citation Index |
| | | Scopus |
| | | Statistical Theory and Method Abstracts |
| | | Zentralblatt MATH |
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