| article html file updated | 6 February 2020 07:29 CET | Update | https://www.mdpi.com/2077-0472/4/1/30 |
| article html file updated | 7 May 2019 18:13 CEST | Update | - |
| article html file updated | 21 March 2019 12:51 CET | Update | - |
| article html file updated | 15 September 2015 11:05 CEST | Update | - |
| article xml file uploaded | 15 September 2015 11:05 CEST | Original file | https://www.mdpi.com/2077-0472/4/1/30/xml |
| article html file updated | 19 August 2015 21:30 CEST | Original file | - |
| article pdf uploaded. | 25 February 2014 11:42 CET | Updated version of record | https://www.mdpi.com/2077-0472/4/1/30/pdf |
| article pdf uploaded. | 25 February 2014 08:38 CET | Updated version of record | https://www.mdpi.com/2077-0472/4/1/30/pdf-vor |
| article pdf uploaded. | 24 February 2014 13:03 CET | Updated version of record | https://www.mdpi.com/2077-0472/4/1/30/pdf-vor |
| article pdf uploaded. | 24 February 2014 11:55 CET | Version of Record | https://www.mdpi.com/2077-0472/4/1/30/pdf-vor |
