Hello. 
I`ve got an expierence with theese guys https://scientific-leaderm.bloggazzo.com/12061191/??-??-??-???
http://arithmetical-compositiono.is-blog.com/14370094/????-??-????-???
https://arithmetical-disquisitioni.getblogs.net/40253891/????-??-????-??
  that were mentioned before. 
And I watned to suggest thanks!