| article html file updated | 6 February 2020 01:38 CET | Update | https://www.mdpi.com/1999-5903/5/2/128 |
| article html file updated | 8 May 2019 06:02 CEST | Update | - |
| article html file updated | 20 March 2019 21:18 CET | Update | - |
| article html file updated | 19 December 2016 11:35 CET | Original file | - |
| article pdf uploaded. | 2 May 2013 14:18 CEST | Updated version of record | https://www.mdpi.com/1999-5903/5/2/128/pdf |
| article pdf uploaded. | 22 April 2013 17:58 CEST | Updated version of record | https://www.mdpi.com/1999-5903/5/2/128/pdf-vor |
| article pdf uploaded. | 22 April 2013 17:56 CEST | Updated version of record | https://www.mdpi.com/1999-5903/5/2/128/pdf-vor |
| article pdf uploaded. | 19 April 2013 14:51 CEST | Version of Record | https://www.mdpi.com/1999-5903/5/2/128/pdf-vor |
