| article html file updated | 6 February 2020 19:40 CET | Update | https://www.mdpi.com/2223-7747/4/2/334 |
| article html file updated | 6 May 2019 17:48 CEST | Update | N/A |
| article html file updated | 26 March 2019 04:44 CET | Update | N/A |
| article html file updated | 12 October 2015 10:32 CEST | Update | N/A |
| article xml file uploaded | 12 October 2015 10:32 CEST | Original file | https://www.mdpi.com/2223-7747/4/2/334/xml |
| article html file updated | 21 August 2015 13:37 CEST | Original file | N/A |
| article pdf uploaded. | 15 June 2015 10:23 CEST | Version of Record | https://www.mdpi.com/2223-7747/4/2/334/pdf |
