| article html file updated | 8 February 2020 07:53 CET | Update | https://www.mdpi.com/2077-0383/6/6/61 |
| article html file updated | 25 September 2019 06:19 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:13 CEST | Update | N/A |
| article html file updated | 27 June 2017 10:37 CEST | Update | N/A |
| article html file updated | 12 June 2017 05:49 CEST | Original file | N/A |
| article xml uploaded. | 12 June 2017 05:48 CEST | Original file | https://www.mdpi.com/2077-0383/6/6/61/xml |
| article pdf uploaded. | 12 June 2017 05:48 CEST | Updated version of record | https://www.mdpi.com/2077-0383/6/6/61/pdf |
| article pdf uploaded. | 9 June 2017 14:54 CEST | Version of Record | https://www.mdpi.com/2077-0383/6/6/61/pdf-vor |
