| article html file updated | 6 February 2020 15:07 CET | Update | https://www.mdpi.com/2304-6732/2/1/57 |
| article html file updated | 7 May 2019 02:36 CEST | Update | N/A |
| article html file updated | 25 March 2019 20:23 CET | Update | N/A |
| article html file updated | 9 November 2015 10:47 CET | Original file | N/A |
| article xml file uploaded | 9 November 2015 10:47 CET | Original file | https://www.mdpi.com/2304-6732/2/1/57/xml |
| article pdf uploaded. | 12 January 2015 14:29 CET | Version of Record | https://www.mdpi.com/2304-6732/2/1/57/pdf |
