CREATE TABLE table_7027 ("Name" TEXT, "Status" TEXT, "Authors" TEXT, "Unit" TEXT, "Location" TEXT)

Who are the authors for the malasaurus of the vyazniki assemblage?
SELECT "Authors" FROM table_7027 WHERE "Unit" = 'vyazniki assemblage' AND "Name" = 'malasaurus'
SELECT "Authors" FROM "table_7027" WHERE "Name" = 'malasaurus' AND "Unit" = 'vyazniki assemblage'