Be sure. According to the requirements of inquiring the format of Elsevier's sci papers, it is known that Elsevier's sci papers should be submitted in duplicate, one electronic version and one manuscript, and the contents of the two versions should be consistent. Besides, Elsevier's sci paper requires the use of cross-references for reference citation, which can put the typesetting machine of references in the middle, so the manuscripts of Elsevier's sci paper must be cross-referenced.