| article html file updated | 8 February 2020 05:53 CET | Update | https://www.mdpi.com/2311-5637/3/2/21 |
| article html file updated | 24 September 2019 20:04 CEST | Update | N/A |
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| article html file updated | 29 June 2017 11:28 CEST | Update | N/A |
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| article html file updated | 15 May 2017 11:47 CEST | Original file | N/A |
| article xml uploaded. | 15 May 2017 11:46 CEST | Original file | https://www.mdpi.com/2311-5637/3/2/21/xml |
| article pdf uploaded. | 15 May 2017 11:46 CEST | Version of Record | https://www.mdpi.com/2311-5637/3/2/21/pdf |
