| article html file updated | 6 February 2020 15:26 CET | Update | https://www.mdpi.com/2304-6732/2/1/104 |
| article html file updated | 7 May 2019 01:58 CEST | Update | N/A |
| article html file updated | 25 March 2019 20:55 CET | Update | N/A |
| article html file updated | 21 August 2015 06:26 CEST | Original file | N/A |
| article pdf uploaded. | 23 January 2015 17:05 CET | Version of Record | https://www.mdpi.com/2304-6732/2/1/104/pdf |
