| article html file updated | 6 February 2020 00:39 CET | Update | https://www.mdpi.com/2073-4344/3/1/176 |
| article html file updated | 8 May 2019 08:11 CEST | Update | - |
| article html file updated | 20 March 2019 18:53 CET | Update | - |
| article html file updated | 17 June 2015 06:47 CEST | Update | - |
| article html file updated | 22 March 2013 14:28 CET | Original file | - |
| article xml uploaded. | 22 March 2013 14:28 CET | Original file | https://www.mdpi.com/2073-4344/3/1/176/xml |
| article pdf uploaded. | 25 February 2013 07:55 CET | Updated version of record | https://www.mdpi.com/2073-4344/3/1/176/pdf |
| article pdf uploaded. | 22 February 2013 14:23 CET | Version of Record | https://www.mdpi.com/2073-4344/3/1/176/pdf-vor |
