| article html file updated | 8 February 2020 17:46 CET | Update | https://www.mdpi.com/2311-5521/2/4/51 |
| article html file updated | 27 September 2019 13:02 CEST | Update | N/A |
| article html file updated | 2 May 2019 22:48 CEST | Update | N/A |
| article html file updated | 2 January 2018 12:31 CET | Update | N/A |
| article html file updated | 11 October 2017 08:36 CEST | Original file | N/A |
| article xml uploaded. | 11 October 2017 08:35 CEST | Update | https://www.mdpi.com/2311-5521/2/4/51/xml |
| article xml uploaded. | 11 October 2017 08:35 CEST | Original file | N/A |
| article pdf uploaded. | 3 October 2017 14:30 CEST | Version of Record | https://www.mdpi.com/2311-5521/2/4/51/pdf |
