| number | 1 |
| author | I. Sommerville |
| article | |
| publication | Software Engineering, 9th ed. |
| edition | |
| publisher | Addison-Wesley |
| issue | |
| date | 2011 |
| part | |
| link | |
| reftext | I. Sommerville, Software Engineering, 9th ed., Addison-Wesley, 2011. |
| number | 2 |
| author | INCOSE |
| article | |
| publication | Systems Engineering Handbook: A Guide for System Life Cycle Processes and Activities |
| edition | version 3.2.2 |
| publisher | International Council on Systems Engineering |
| issue | |
| date | 2012 |
| part | |
| link | |
| reftext | INCOSE, Systems Engineering Handbook: A Guide for System Life Cycle Processes and Activities, version 3.2.2, International Council on Systems Engineering, 2012. |
