| article html file updated | 6 February 2020 03:05 CET | Update | https://www.mdpi.com/2304-8158/2/3/282 |
| article html file updated | 8 May 2019 03:07 CEST | Update | - |
| article html file updated | 21 March 2019 00:57 CET | Update | - |
| article html file updated | 10 February 2017 03:40 CET | Update | - |
| article html file updated | 17 June 2015 11:04 CEST | Original file | - |
| article pdf uploaded. | 16 July 2013 10:42 CEST | Updated version of record | https://www.mdpi.com/2304-8158/2/3/282/pdf |
| article pdf uploaded. | 9 July 2013 11:00 CEST | Version of Record | https://www.mdpi.com/2304-8158/2/3/282/pdf-vor |
