| article html file updated | 6 February 2020 15:28 CET | Update | https://www.mdpi.com/2220-9964/4/1/172 |
| article html file updated | 7 May 2019 01:54 CEST | Update | - |
| article html file updated | 25 March 2019 20:59 CET | Update | - |
| article html file updated | 21 August 2015 06:31 CEST | Update | - |
| article html file updated | 15 February 2015 10:06 CET | Update | - |
| article xml file uploaded | 15 February 2015 10:06 CET | Update | https://www.mdpi.com/2220-9964/4/1/172/xml |
| article html file updated | 6 February 2015 02:26 CET | Update | - |
| article xml file uploaded | 6 February 2015 02:26 CET | Update | - |
| article html file updated | 29 January 2015 07:38 CET | Original file | - |
| article xml file uploaded | 29 January 2015 07:38 CET | Original file | - |
| article pdf uploaded. | 27 January 2015 07:47 CET | Updated version of record | https://www.mdpi.com/2220-9964/4/1/172/pdf |
| article pdf uploaded. | 26 January 2015 16:45 CET | Version of Record | https://www.mdpi.com/2220-9964/4/1/172/pdf-vor |
