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 \begin{frontmatter}
 
-\title{Cross-chain Smart Contract Invocations - a Multi-vocal Literature Review Protocol}
-
-
+\title{Cross-chain Smart Contract Invocations - a Multi-vocal Literature Review Protocol\\V0.1}
 \author[iaas]{Ghareeb Falazi\corref{corrauthor}}
 \address[iaas]{Universit\"atsstra\ss{}e 38, 70569 Stuttgart}
 \cortext[corrauthor]{Corresponding author}