| article html file updated | 8 February 2020 07:04 CET | Update | https://www.mdpi.com/2227-7102/7/2/56 |
| article html file updated | 25 September 2019 02:13 CEST | Update | - |
| article html file updated | 3 May 2019 19:44 CEST | Update | - |
| article html file updated | 27 October 2017 09:58 CEST | Update | - |
| article html file updated | 31 May 2017 10:49 CEST | Update | - |
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| article xml uploaded. | 31 May 2017 10:21 CEST | Original file | https://www.mdpi.com/2227-7102/7/2/56/xml |
| article pdf uploaded. | 31 May 2017 10:21 CEST | Version of Record | https://www.mdpi.com/2227-7102/7/2/56/pdf |
