| article html file updated | 7 February 2020 08:06 CET | Update | https://www.mdpi.com/2077-1312/4/2/33 |
| article html file updated | 5 May 2019 16:57 CEST | Update | - |
| article html file updated | 27 March 2019 03:35 CET | Update | - |
| article html file updated | 27 October 2017 11:18 CEST | Update | - |
| article html file updated | 3 May 2016 08:06 CEST | Original file | - |
| article xml uploaded. | 3 May 2016 08:04 CEST | Original file | https://www.mdpi.com/2077-1312/4/2/33/xml |
| article pdf uploaded. | 3 May 2016 08:04 CEST | Version of Record | https://www.mdpi.com/2077-1312/4/2/33/pdf |
