https://docs.spring.io/spring-security/site/docs/current/reference/htmlsingle/

https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/reference/html/
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/reference/htmlsingle/
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/reference/pdf/spring-security-reference.pdf
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/apidocs/
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/guides/html5/
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/guides/html5/helloworld-xml.html
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/guides/html5/hellomvc-javaconfig.html
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/guides/html5/helloworld-boot.html
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/guides/html5/helloworld-javaconfig.html
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/guides/html5/form-javaconfig.html

https://docs.spring.io/spring-security/reference/6.0.0-M4/servlet/authentication/architecture.html#servlet-authentication-providermanager
    !!!

api
https://docs.spring.io/spring-security/site/docs/4.2.11.RELEASE/apidocs/org/springframework/security/config/annotation/web/builders/HttpSecurity.html

old
https://docs.spring.io/spring-security/site/docs/4.1.3.RELEASE/reference/htmlsingle/
Expression-based access control
https://docs.spring.io/spring-security/site/docs/4.1.3.RELEASE/reference/htmlsingle/#el-access