temporal adverbs
T.E. Yanko. Russian adverb davno ‘long ago’ and aspectual verb forms: spoken corpora data
Trudy IRY RAS. 2020. № 3 (25), Pages. 131 - 143
Irina M. Kobozeva. THE KALEIDOSCOPE OF COMPOUND CONJUNCTIONS OF IMMEDIATE ANTERIORITY IN RUSSIAN: AS YET UNRECOGNIZED BUT ALREADY FUNCTIONING CONJUNCTIONS
Trudy IRY RAS. 2019. № 4 (22), Pages. 134 - 146