| article html file updated | 9 February 2020 05:08 CET | Update | https://www.mdpi.com/1996-1073/11/2/309 |
| article html file updated | 30 September 2019 10:13 CEST | Update | N/A |
| article html file updated | 1 May 2019 21:51 CEST | Update | N/A |
| article html file updated | 17 April 2019 20:39 CEST | Update | N/A |
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| article html file updated | 14 March 2018 15:37 CET | Update | N/A |
| article html file updated | 1 February 2018 08:52 CET | Original file | N/A |
| article xml uploaded. | 1 February 2018 08:40 CET | Update | https://www.mdpi.com/1996-1073/11/2/309/xml |
| article xml uploaded. | 1 February 2018 08:40 CET | Update | N/A |
| article xml uploaded. | 1 February 2018 08:40 CET | Original file | N/A |
| article pdf uploaded. | 1 February 2018 08:40 CET | Version of Record | https://www.mdpi.com/1996-1073/11/2/309/pdf |