| article html file updated | 6 February 2020 07:57 CET | Update | https://www.mdpi.com/2220-9964/3/1/345 |
| article html file updated | 7 May 2019 17:13 CEST | Update | - |
| article html file updated | 21 March 2019 13:59 CET | Update | - |
| article html file updated | 19 August 2015 23:58 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/2220-9964/3/1/345/xml |
| article pdf uploaded. | 19 March 2014 13:20 CET | Updated version of record | https://www.mdpi.com/2220-9964/3/1/345/pdf |
| article pdf uploaded. | 17 March 2014 15:08 CET | Version of Record | https://www.mdpi.com/2220-9964/3/1/345/pdf-vor |
