| article html file updated | 7 February 2020 02:40 CET | Update | https://www.mdpi.com/2077-1312/4/1/3 |
| article html file updated | 6 May 2019 04:03 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:11 CET | Update | N/A |
| article html file updated | 27 October 2017 11:12 CEST | Original file | N/A |
| article pdf uploaded. | 24 December 2015 14:46 CET | Version of Record | https://www.mdpi.com/2077-1312/4/1/3/pdf |
| article xml uploaded. | 24 December 2015 14:46 CET | Original file | https://www.mdpi.com/2077-1312/4/1/3/xml |
