MySql database schema referencing problem

Question

I have the following tables; which will be holding information about various types of articles. I need some help with coming up with a proper schema for this.

Tables are:

CREATE TABLE IF NOT EXISTS `math_articles` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` char(250) NOT NULL,
  `body` text,
  PRIMARY KEY (`id`),
  UNIQUE KEY `title` (`title`)
)
CREATE TABLE IF NOT EXISTS `news_articles` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` char(250) NOT NULL,
  `body` text,
  PRIMARY KEY (`id`),
  UNIQUE KEY `title` (`title`)
)
CREATE TABLE IF NOT EXISTS `other_articles` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` char(250) NOT NULL,
  `body` text,
  PRIMARY KEY (`id`),
  UNIQUE KEY `title` (`title`)
)
CREATE TABLE IF NOT EXISTS `references` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `article_from_table_name` text NOT NULL,
  `from_id` int(11) NOT NULL,
  `article_to_table_name` text NOT NULL,
  `to_id` int(11) NOT NULL,
  PRIMARY KEY (`id`)
)

inserting test data:

INSERT INTO  `TEST`.`math_articles` (
`id` ,
`title` ,
`body`
)
VALUES (
NULL ,  'fibonacci sequences',  'fib sequences are: 0,1,1,2,3,5...also see article Leonardo of Pisa'
);

Since this math_articles.title = 'fibonacci sequences' mentions that article 'Leonardo of Pisa' my program will insert in to other_articles table the following data:

INSERT INTO  `TEST`.`other_articles` (
`id` ,
`title` ,
`body`
)
VALUES (
NULL ,  'Leonardo of Pisa', 'Leonardo of Pisa also known as Leonardo of Pisa, Leonardo Pisano, Leonardo Bonacci, Leonardo Fibonacci, or, most commonly, simply Fibonacci, was.....'
);

The schema problem regarding table references

Since the table other_articles.title = 'Leonardo of Pisa' was referenced in the table math_articles.title = 'fibonacci sequences' i was to save this reference in the references table as follows:

not sure/problem insert into references table

INSERT INTO `TEST`.`references` 
(`id`, `article_from_table_name`, `from_id`, `article_to_table_name`, `to_id`) 
VALUES
(NULL, 'math_articles', '1', 'other_articles', '1');

Whats the best way of going about saving these references?

My issues with the references table schema!

The data type of the two columns article_from_table_name and article_to_table_name is text but they are actual tables in my database.
from_id and to_id should be forign keys of their prespective tables as from_id = article_from_table_name.id and to_id = article_to_table_name.id I don't know how to define this in the schema.
what if i delete the article math_articles.title = 'fibonacci sequences' then the references table to also be updated, I know I should use some sort of "ON DELETE CASCADE' trigger.
- Regards