I am trying to search on MathSciNet for an article which contains $C^*$ in its title (as in $C^*$-algebras) however I can't figure out how to get MathSciNet not to interpret the '*' as a stand in for an arbitrary sequence of characters.
I have emailed technical support at MathSciNet. Unfortunately they do not know how to search for a string containing a *, as * is interpreted as a wild card. However, if you know the word before and after the * then you can use the proximity search tool adjN which is a stand in for at most N-1 words.
For example, searching for "C adj2 algebra" will find "$C^*$-algebra", as well as "l.m.c. algebras".