| article html file updated | 6 February 2020 17:53 CET | Update | https://www.mdpi.com/2076-0760/4/2/294 |
| article html file updated | 20 September 2019 20:27 CEST | Update | N/A |
| article html file updated | 6 May 2019 21:31 CEST | Update | N/A |
| article html file updated | 26 March 2019 01:03 CET | Update | N/A |
| article html file updated | 23 March 2017 05:03 CET | Original file | N/A |
| article pdf uploaded. | 21 April 2015 15:01 CEST | Version of Record | https://www.mdpi.com/2076-0760/4/2/294/pdf |
