| article html file updated | 6 February 2020 16:04 CET | Update | https://www.mdpi.com/2225-1154/3/1/168 |
| article html file updated | 7 May 2019 00:45 CEST | Update | - |
| article html file updated | 25 March 2019 21:58 CET | Update | - |
| article html file updated | 21 August 2015 07:51 CEST | Update | - |
| article html file updated | 28 February 2015 03:09 CET | Original file | - |
| article xml file uploaded | 28 February 2015 03:09 CET | Original file | https://www.mdpi.com/2225-1154/3/1/168/xml |
| article pdf uploaded. | 27 February 2015 09:54 CET | Updated version of record | https://www.mdpi.com/2225-1154/3/1/168/pdf |
| article pdf uploaded. | 17 February 2015 11:51 CET | Version of Record | https://www.mdpi.com/2225-1154/3/1/168/pdf-vor |
