| article html file updated | 6 February 2020 07:59 CET | Update | https://www.mdpi.com/2220-9964/3/1/368 |
| article html file updated | 7 May 2019 17:09 CEST | Update | - |
| article html file updated | 21 March 2019 14:05 CET | Update | - |
| article html file updated | 20 August 2015 00:13 CEST | Update | - |
| article html file updated | 24 June 2014 12:11 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:11 CEST | Original file | https://www.mdpi.com/2220-9964/3/1/368/xml |
| article pdf uploaded. | 24 March 2014 09:01 CET | Updated version of record | https://www.mdpi.com/2220-9964/3/1/368/pdf |
| article pdf uploaded. | 19 March 2014 09:23 CET | Version of Record | https://www.mdpi.com/2220-9964/3/1/368/pdf-vor |
