You could try the sysarticles table in the published database or in the distribution database on your distributor you could run something like:
selectss.srvname,
p.publication,
a.publisher_db,
a.article
frommspublicationsp
inner join
msarticlesa
ona.publisher_id= p.publisher_id
anda.publication_id= p.publication_id
anda.publisher_db= p.publisher_db
inner join
master.dbo.sysserversss
onss.srvid= p.publisher_id
order by ss.srvname,p.publication,a.publisher_db,a.article