Journals

IJL (International Journal of Lexicography)
Dictionaries (Journal of The Dictionary Society of North America)
Lexicographica (International Annual for Lexicography)
LexicoNordica (Journal of the Nordisk Forening for Leksikografi)
Lexikos (Journal for the Lexicographical Specialist)
Lexicography (Journal of ASIALEX)
KDN (Kernerman Dictionary News)

Other websites

Reinhard Hartmann’s comprehensive list of lexicography-related websites.