| article html file updated | 7 February 2020 07:17 CET | Update | https://www.mdpi.com/2311-5521/1/2/12 |
| article html file updated | 5 May 2019 18:35 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:56 CET | Update | N/A |
| article html file updated | 27 October 2017 10:20 CEST | Update | N/A |
| article html file updated | 14 April 2016 14:35 CEST | Original file | N/A |
| article xml uploaded. | 14 April 2016 14:34 CEST | Original file | https://www.mdpi.com/2311-5521/1/2/12/xml |
| article pdf uploaded. | 14 April 2016 14:34 CEST | Version of Record | https://www.mdpi.com/2311-5521/1/2/12/pdf |
