| article html file updated | 11 February 2020 04:22 CET | Update | https://www.mdpi.com/1996-1073/12/1/4 |
| article html file updated | 27 April 2019 16:41 CEST | Update | N/A |
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| article html file updated | 20 December 2018 12:26 CET | Original file | N/A |
| article pdf uploaded. | 20 December 2018 12:25 CET | Version of Record | https://www.mdpi.com/1996-1073/12/1/4/pdf |
| article xml uploaded. | 20 December 2018 12:25 CET | Update | https://www.mdpi.com/1996-1073/12/1/4/xml |
| article xml file uploaded | 20 December 2018 12:25 CET | Original file | N/A |