| article html file updated | 8 February 2020 08:00 CET | Update | https://www.mdpi.com/2311-5521/2/2/31 |
| article html file updated | 25 September 2019 06:55 CEST | Update | N/A |
| article html file updated | 3 May 2019 17:59 CEST | Update | N/A |
| article html file updated | 27 October 2017 10:12 CEST | Update | N/A |
| article html file updated | 12 June 2017 09:06 CEST | Original file | N/A |
| article xml uploaded. | 12 June 2017 09:04 CEST | Update | https://www.mdpi.com/2311-5521/2/2/31/xml |
| article pdf uploaded. | 12 June 2017 09:04 CEST | Updated version of record | https://www.mdpi.com/2311-5521/2/2/31/pdf |
| article pdf uploaded. | 10 June 2017 12:26 CEST | Version of Record | https://www.mdpi.com/2311-5521/2/2/31/pdf-vor |
