| article html file updated | 7 February 2020 22:50 CET | Update | https://www.mdpi.com/2224-2708/6/1/2 |
| article html file updated | 23 September 2019 04:52 CEST | Update | N/A |
| article html file updated | 4 May 2019 12:22 CEST | Update | N/A |
| article html file updated | 29 March 2017 10:35 CEST | Update | N/A |
| article html file updated | 8 February 2017 13:26 CET | Original file | N/A |
| article xml uploaded. | 8 February 2017 13:24 CET | Update | https://www.mdpi.com/2224-2708/6/1/2/xml |
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| article xml uploaded. | 8 February 2017 13:24 CET | Original file | N/A |
| article pdf uploaded. | 8 February 2017 13:24 CET | Version of Record | https://www.mdpi.com/2224-2708/6/1/2/pdf |
