List stored functions that reference a table in PostgreSQL

Question

Just a quick and simple question: in PostgreSQL, how do you list the names of all stored functions/stored procedures using a table using just a SELECT statement, if possible

Answer 1

For retrieving the argument types of the functions, which are required when referencing the function in ALTER -- using oldevectortypes worked well for me.

See How can I get a list of all functions stored in the database of a particular schema in PostgreSQL?