| article html file updated | 7 February 2020 10:12 CET | Update | https://www.mdpi.com/2226-4787/4/2/21 |
| article html file updated | 5 May 2019 12:52 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:34 CET | Update | N/A |
| article html file updated | 1 July 2016 12:19 CEST | Update | N/A |
| article html file updated | 15 June 2016 10:54 CEST | Original file | N/A |
| article xml uploaded. | 15 June 2016 10:53 CEST | Original file | https://www.mdpi.com/2226-4787/4/2/21/xml |
| article pdf uploaded. | 15 June 2016 10:53 CEST | Version of Record | https://www.mdpi.com/2226-4787/4/2/21/pdf |
