| article html file updated | 7 February 2020 20:57 CET | Update | https://www.mdpi.com/1999-4907/8/1/21 |
| article html file updated | 22 September 2019 18:47 CEST | Update | - |
| article html file updated | 4 May 2019 16:27 CEST | Update | - |
| article html file updated | 8 February 2017 10:20 CET | Update | - |
| article html file updated | 24 January 2017 09:12 CET | Update | - |
| article xml uploaded. | 24 January 2017 09:10 CET | Update | https://www.mdpi.com/1999-4907/8/1/21/xml |
| article xml uploaded. | 24 January 2017 09:10 CET | Update | - |
| article pdf uploaded. | 24 January 2017 09:07 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/1/21/pdf |
| article html file updated | 16 January 2017 05:20 CET | Update | - |
| article xml uploaded. | 16 January 2017 05:19 CET | Update | - |
| article xml uploaded. | 16 January 2017 05:19 CET | Update | - |
| article pdf uploaded. | 16 January 2017 05:19 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/1/21/pdf-vor |
| article html file updated | 6 January 2017 14:04 CET | Original file | - |
| article pdf uploaded. | 6 January 2017 14:02 CET | Version of Record | https://www.mdpi.com/1999-4907/8/1/21/pdf-vor |
