| article html file updated | 6 February 2020 14:55 CET | Update | https://www.mdpi.com/2304-6732/2/1/13 |
| article html file updated | 7 May 2019 03:01 CEST | Update | N/A |
| article html file updated | 25 March 2019 20:02 CET | Original file | N/A |
| article pdf uploaded. | 5 January 2015 11:21 CET | Version of Record | https://www.mdpi.com/2304-6732/2/1/13/pdf |
