Logging is not configured properly

I am not seeing any logging/ouputs to stdout. Do I have to configure this on my side? (I am using the latest .jar file)

log4j:WARN No appenders could be found for logger (org.crossref.refmatching.Utils).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.