| article html file updated | 6 February 2020 02:03 CET | Update | https://www.mdpi.com/2218-1989/3/2/347 |
| article html file updated | 8 May 2019 05:15 CEST | Update | - |
| article html file updated | 20 March 2019 22:26 CET | Update | - |
| article html file updated | 17 June 2015 09:17 CEST | Update | - |
| article html file updated | 7 January 2014 12:29 CET | Original file | - |
| article xml file uploaded | 7 January 2014 12:29 CET | Original file | https://www.mdpi.com/2218-1989/3/2/347/xml |
| article supplementary file uploaded. | 14 May 2013 12:33 CEST | - | https://www.mdpi.com/2218-1989/3/2/347#supplementary |
| article pdf uploaded. | 14 May 2013 12:33 CEST | Version of Record | https://www.mdpi.com/2218-1989/3/2/347/pdf |
