Acharonim: diferència entre les revisions

* [http://www.aish.com/literacy/concepts/The_Rules_of_Halacha.asp The Rules of Halacha], Rabí Aryeh Kaplan

* [http://www.faqs.org/faqs/judaism/FAQ/03-Torah-Halacha/section-52.html The Different Rabbinic Eras]

* [http://web.archive.org/web/http://www.tzemachdovid.org/gedolim/jhistory/index.html Torah Personalities and the Times in Which They Lived] ([[MP3]]<nowiki/>s), Rabí R.Y. Eisenman.