| article html file updated | 7 February 2020 23:53 CET | Update | https://www.mdpi.com/2227-7102/7/1/30 |
| article html file updated | 4 May 2019 10:16 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:55 CEST | Update | N/A |
| article html file updated | 21 February 2017 12:53 CET | Update | N/A |
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| article html file updated | 21 February 2017 12:53 CET | Original file | N/A |
| article xml uploaded. | 21 February 2017 12:52 CET | Original file | https://www.mdpi.com/2227-7102/7/1/30/xml |
| article pdf uploaded. | 21 February 2017 12:52 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/30/pdf |
