| article html file updated | 7 February 2020 05:52 CET | Update | https://www.mdpi.com/2311-5637/2/1/7 |
| article html file updated | 5 May 2019 21:32 CEST | Update | N/A |
| article html file updated | 26 March 2019 23:24 CET | Update | N/A |
| article html file updated | 9 October 2016 08:55 CEST | Original file | N/A |
| article xml uploaded. | 14 March 2016 11:25 CET | Original file | https://www.mdpi.com/2311-5637/2/1/7/xml |
| article pdf uploaded. | 14 March 2016 11:25 CET | Version of Record | https://www.mdpi.com/2311-5637/2/1/7/pdf |
