| article html file updated | 7 February 2020 21:32 CET | Update | https://www.mdpi.com/2077-0472/7/1/4 |
| article html file updated | 22 September 2019 21:50 CEST | Update | - |
| article html file updated | 4 May 2019 15:07 CEST | Update | - |
| article html file updated | 7 February 2017 04:40 CET | Update | - |
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| article html file updated | 17 January 2017 07:29 CET | Update | - |
| article xml uploaded. | 17 January 2017 07:28 CET | Update | https://www.mdpi.com/2077-0472/7/1/4/xml |
| article pdf uploaded. | 17 January 2017 07:28 CET | Updated version of record | https://www.mdpi.com/2077-0472/7/1/4/pdf |
| article html file updated | 16 January 2017 09:49 CET | Original file | - |
| article xml uploaded. | 16 January 2017 09:48 CET | Original file | - |
| article pdf uploaded. | 16 January 2017 09:48 CET | Version of Record | https://www.mdpi.com/2077-0472/7/1/4/pdf-vor |
