| article html file updated | 7 February 2020 02:24 CET | Update | https://www.mdpi.com/2227-9032/3/4/1271 |
| article html file updated | 21 September 2019 08:09 CEST | Update | N/A |
| article html file updated | 6 May 2019 04:38 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:46 CET | Update | N/A |
| article html file updated | 18 May 2016 05:51 CEST | Original file | N/A |
| article xml uploaded. | 21 December 2015 08:54 CET | Original file | https://www.mdpi.com/2227-9032/3/4/1271/xml |
| article pdf uploaded. | 21 December 2015 08:54 CET | Updated version of record | https://www.mdpi.com/2227-9032/3/4/1271/pdf |
| article pdf uploaded. | 18 December 2015 08:53 CET | Version of Record | https://www.mdpi.com/2227-9032/3/4/1271/pdf-vor |
