| article html file updated | 6 February 2020 03:55 CET | Update | https://www.mdpi.com/2218-273X/3/3/578 |
| article html file updated | 8 May 2019 01:25 CEST | Update | N/A |
| article html file updated | 21 March 2019 03:23 CET | Update | N/A |
| article html file updated | 21 March 2018 08:28 CET | Update | N/A |
| article html file updated | 15 March 2018 08:21 CET | Update | N/A |
| article html file updated | 15 March 2018 02:17 CET | Update | N/A |
| article html file updated | 14 March 2018 18:00 CET | Update | N/A |
| article html file updated | 17 June 2015 12:33 CEST | Update | N/A |
| article html file updated | 28 April 2014 10:34 CEST | Original file | N/A |
| article xml file uploaded | 28 April 2014 10:34 CEST | Original file | https://www.mdpi.com/2218-273X/3/3/578/xml |
| article pdf uploaded. | 23 August 2013 17:23 CEST | Updated version of record | https://www.mdpi.com/2218-273X/3/3/578/pdf |
| article pdf uploaded. | 21 August 2013 14:27 CEST | Version of Record | https://www.mdpi.com/2218-273X/3/3/578/pdf-vor |