| article html file updated | 7 February 2020 10:00 CET | Update | https://www.mdpi.com/2304-6775/4/2/15 |
| article html file updated | 5 May 2019 13:16 CEST | Update | - |
| article html file updated | 27 March 2019 07:10 CET | Update | - |
| article html file updated | 4 July 2016 10:26 CEST | Update | - |
| article html file updated | 9 June 2016 11:43 CEST | Original file | - |
| article xml uploaded. | 9 June 2016 11:42 CEST | Original file | https://www.mdpi.com/2304-6775/4/2/15/xml |
| article pdf uploaded. | 9 June 2016 11:42 CEST | Version of Record | https://www.mdpi.com/2304-6775/4/2/15/pdf |
