| article html file updated | 6 February 2020 10:11 CET | Update | https://www.mdpi.com/1999-4893/7/2/253 |
| article html file updated | 20 September 2019 09:37 CEST | Update | N/A |
| article html file updated | 21 March 2019 19:28 CET | Update | N/A |
| article html file updated | 28 July 2017 05:27 CEST | Original file | N/A |
| article xml uploaded. | 28 July 2017 05:26 CEST | Update | https://www.mdpi.com/1999-4893/7/2/253/xml |
| article pdf uploaded. | 25 June 2014 10:21 CEST | Updated version of record | https://www.mdpi.com/1999-4893/7/2/253/pdf |
| article pdf uploaded. | 23 June 2014 14:48 CEST | Version of Record | https://www.mdpi.com/1999-4893/7/2/253/pdf-vor |
