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  41. ** ^  ** [ "Angular Cross Site Request Forgery (XSRF) Protection" ](https://docs.angularjs.org/api/ng/service/$http#cross-site-request-forgery-xsrf-protection) . [ AngularJS ](/wiki/AngularJS "AngularJS") . Retrieved  January 20,  2015  . 
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  47. ** ^  ** Dusseault, L.; Snell, J. (2010). [ "RFC 5789" ](http://tools.ietf.org/html/rfc5789#section-3.1) . [ doi ](/wiki/Doi_\(identifier\) "Doi \(identifier\)") : [ 10.17487/RFC5789 ](https://doi.org/10.17487%2FRFC5789) . [ S2CID ](/wiki/S2CID_\(identifier\) "S2CID \(identifier\)") [ 42062521 ](https://api.semanticscholar.org/CorpusID:42062521) . Retrieved  December 24,  2014  .  ` {{ [ cite journal ](/wiki/Template:Cite_journal "Template:Cite journal") }} ` :  Cite journal requires ` |journal= ` ( [ help ](/wiki/Help:CS1_errors#missing_periodical "Help:CS1 errors") ) 
  48. ** ^  ** Nottingham, M.; McManus, P.; Reschke, J. (April 2016). [ "HTTP Alternative Services" ](https://tools.ietf.org/html/rfc7838) . IETF. [ doi ](/wiki/Doi_\(identifier\) "Doi \(identifier\)") :  [ 10.17487/RFC7838 ](https://doi.org/10.17487%2FRFC7838) . Retrieved  April 19,  2016  .  ` {{ [ cite journal ](/wiki/Template:Cite_journal "Template:Cite journal") }} ` :  Cite journal requires ` |journal= ` ( [ help ](/wiki/Help:CS1_errors#missing_periodical "Help:CS1 errors") ) 
  49. ** ^  ** Nottingham, M.; McManus, P.; Reschke, J. (April 2016). [ "HTTP Alternative Services, section 3" ](https://tools.ietf.org/html/rfc7838#section-3) . IETF. [ doi ](/wiki/Doi_\(identifier\) "Doi \(identifier\)") :  [ 10.17487/RFC7838 ](https://doi.org/10.17487%2FRFC7838) . Retrieved  June 8,  2017  .  ` {{ [ cite journal ](/wiki/Template:Cite_journal "Template:Cite journal") }} ` :  Cite journal requires ` |journal= ` ( [ help ](/wiki/Help:CS1_errors#missing_periodical "Help:CS1 errors") ) 
  50. ** ^  ** Reschke, J. (2011). [ "RFC 6266" ](http://tools.ietf.org/html/rfc6266) . [ doi ](/wiki/Doi_\(identifier\) "Doi \(identifier\)") :  [ 10.17487/RFC6266 ](https://doi.org/10.17487%2FRFC6266) . Retrieved  March 13,  2015  .  ` {{ [ cite journal ](/wiki/Template:Cite_journal "Template:Cite journal") }} ` :  Cite journal requires ` |journal= ` ( [ help ](/wiki/Help:CS1_errors#missing_periodical "Help:CS1 errors") ) 
  51. ** ^  ** [ "Content-Language" ](https://datatracker.ietf.org/doc/html/rfc9110#section-8.5) . [ _HTTP Semantics_ ](https://datatracker.ietf.org/doc/html/rfc9110) . June 2022. sec. 8.5. [ doi ](/wiki/Doi_\(identifier\) "Doi \(identifier\)") :  [ 10.17487/RFC9110 ](https://doi.org/10.17