It won't be enough, it's too complicated to do with conditionals and computation. 

If you store user email and article id with each comment you can use live plugin from

https://www.seblod.com/resources/extensions/plug-ins/sql-pack

to query your forms database table for emails of users that responded to this article. With live plugin you can set value of hidden field that can be used as To(fields) in email field.

Hello,

So, I make this but it don’t work :

=> In each comment :

1) I store the article_parent_id in a text field with the ID of current article using live value;

2) I store the email_of_current_user writing comment with a text field and live plugin with this query :

SELECT email FROM #__users WHERE id=$user->id

3) article_parent_id and email_current_user are stored in #__content

4) I store another text field all_authors_comment with live plugin and this query :

SELECT email_of_current_user FROM #__content WHERE id= $uri->get('id')

5) I use an email field to send notification to call all_authors_comment field as To (field)

Is it that what you mean ?

"3) article_parent_id and email_current_user are stored in #__content"

This is not true - Seblod does not store in #__content, so also 4) can't work. Seblod stores data in the one or 2 tables made for each content type (see manual)