| article html file updated | 7 February 2020 18:42 CET | Update | https://www.mdpi.com/2075-4418/6/4/44 |
| article html file updated | 22 September 2019 07:18 CEST | Update | N/A |
| article html file updated | 4 May 2019 21:10 CEST | Update | N/A |
| article html file updated | 28 December 2016 11:46 CET | Update | N/A |
| article html file updated | 28 November 2016 08:21 CET | Original file | N/A |
| article xml uploaded. | 28 November 2016 08:20 CET | Original file | https://www.mdpi.com/2075-4418/6/4/44/xml |
| article pdf uploaded. | 28 November 2016 08:20 CET | Version of Record | https://www.mdpi.com/2075-4418/6/4/44/pdf |
