| article html file updated | 8 February 2020 04:09 CET | Update | https://www.mdpi.com/1999-4907/8/4/133 |
| article html file updated | 24 September 2019 11:01 CEST | Update | - |
| article html file updated | 4 May 2019 01:09 CEST | Update | - |
| article html file updated | 28 April 2017 06:45 CEST | Update | - |
| article html file updated | 22 April 2017 08:06 CEST | Original file | - |
| article xml uploaded. | 22 April 2017 08:05 CEST | Original file | https://www.mdpi.com/1999-4907/8/4/133/xml |
| article pdf uploaded. | 22 April 2017 08:05 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/4/133/pdf |
