| HD28-9999 | Aestimum | worldcat | |
| HD28-9999 | Global Journal of Economics and Business | worldcat | |
| HD28-9999 | Journal of Peer Production | worldcat | |
| HD28-9999 | Logistics Research | worldcat | |
| HD28-9999 | Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego | worldcat | |
| HD28-9999 | Rivista CQIA | worldcat |