The paper 'CMOS analog four-quadrant multiplier free of voltage reference generators' has how many authors?
Find the number of authors of the paper 'CMOS analog four-quadrant multiplier free of voltage reference generators'.
SELECT ?answer WHERE { <https://dblp.org/rec/conf/sbcci/SousaASGPSC19> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/conf/sbcci/SousaASGPSC19>