| article html file updated | 7 February 2020 06:17 CET | Update | https://www.mdpi.com/2304-8158/5/2/21 |
| article html file updated | 5 May 2019 20:41 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:07 CET | Update | N/A |
| article html file updated | 10 February 2017 03:45 CET | Update | N/A |
| article html file updated | 5 July 2016 06:34 CEST | Original file | N/A |
| article xml uploaded. | 23 March 2016 09:00 CET | Original file | https://www.mdpi.com/2304-8158/5/2/21/xml |
| article pdf uploaded. | 23 March 2016 09:00 CET | Version of Record | https://www.mdpi.com/2304-8158/5/2/21/pdf |
