Hi, I'd like to help you with your question.
I am sorry you have been dealing with this situation. It is difficult and hurtful when a parent is being selfish. We all need our parents to be there for us and when they are not, it can hurt very much.
From what you said, it sounds as if you have tried a lot of things to get her attention and help her understand how she is affecting you with her behavior. I was impressed that you even tried therapy with her. That usually helps enormously in situations such as this one.
However, the fact that you have tried so many things and your mother still does not have insight into her hurtful behavior tells me that she does not want to see what she is doing. She may even have narcisstic personality disorder, a disorder where people think of themselves first, put themselves above others and believe they are better than others.This may or may not describe your mother, but it is a possible diagnosis.
I am concerned that she continues to treat you this way. You may want to consider that she will not understand her behavior and that as a result, you are going to continue to get hurt by what she is doing. This is going to effect you. Have you thought of decreasing your contact with her? Although she is your mother, you have no special obligation to be treated in such a manner. This doesn't mean you don't love her, just that you will not accept the behavior. Many children who are abused continue to love their parents but cannot be in contact with them because the parents will not stop the abuse. Considering your mother has no insight and therefore will probably continue the behavior, you may want to protect yourself instead and start decreasing your contact with her or shorten the conversations. You can tell her the truth as to why, if you feel it will not cause you any harm.
Also, if you have not already, consider therapy to help you increase your self esteem. Dealing with family or anyone who is self centered can affect you more than you realize and in therapy, you can refocus on yourself and what you need.
If you still want to pursue showing your mother the articles, here are some I found:
I hope this has helped you,