Excellent information @nenio. Thanks for sharing!. Voted!. I'm following you. Follow me!. I'm physicist.

I invite you to see my website http://www.cmc.org.ve/tsweb where I have published drafts of the texts that I am writing.

I am participating in the Cervantes Photography Contest: 4th Delivery. I invite you to see, comment and vote my photos: https://steemit.com/spanish/@tsoldovieri/concurso-de-fotografia-cervantes-4a-entrega

I invite you to see also: https://steemit.com/spanish/@tsoldovieri/la-planta-de-lechoza-o-papaya-d

Regards!.