| article html file updated | 8 February 2020 03:49 CET | Update | https://www.mdpi.com/2077-0383/6/4/47 |
| article html file updated | 24 September 2019 09:05 CEST | Update | N/A |
| article html file updated | 4 May 2019 01:47 CEST | Update | N/A |
| article html file updated | 28 April 2017 06:48 CEST | Update | N/A |
| article html file updated | 18 April 2017 11:59 CEST | Original file | N/A |
| article xml uploaded. | 18 April 2017 11:57 CEST | Original file | https://www.mdpi.com/2077-0383/6/4/47/xml |
| article pdf uploaded. | 18 April 2017 11:57 CEST | Version of Record | https://www.mdpi.com/2077-0383/6/4/47/pdf |
