| article html file updated | 9 February 2020 10:58 CET | Update | https://www.mdpi.com/1996-1073/11/4/728 |
| article html file updated | 1 October 2019 21:43 CEST | Update | - |
| article html file updated | 1 May 2019 09:20 CEST | Update | - |
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| article html file updated | 1 May 2018 08:32 CEST | Update | - |
| article html file updated | 23 March 2018 10:04 CET | Original file | - |
| article xml uploaded. | 23 March 2018 10:03 CET | Original file | https://www.mdpi.com/1996-1073/11/4/728/xml |
| article pdf uploaded. | 23 March 2018 10:03 CET | Version of Record | https://www.mdpi.com/1996-1073/11/4/728/pdf |
