| article html file updated | 7 February 2020 21:31 CET | Update | https://www.mdpi.com/1999-4907/8/1/26 |
| article html file updated | 22 September 2019 21:44 CEST | Update | N/A |
| article html file updated | 4 May 2019 15:10 CEST | Update | N/A |
| article html file updated | 8 February 2017 10:22 CET | Update | N/A |
| article html file updated | 18 January 2017 05:51 CET | Original file | N/A |
| article xml uploaded. | 18 January 2017 05:50 CET | Original file | https://www.mdpi.com/1999-4907/8/1/26/xml |
| article pdf uploaded. | 18 January 2017 05:50 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/1/26/pdf |
| article pdf uploaded. | 15 January 2017 04:49 CET | Version of Record | https://www.mdpi.com/1999-4907/8/1/26/pdf-vor |
