@article{compref101,
   author = {Curtis,B and Sheppard,SB and Milliman,P and Borst,MA and Love,T},
   year = {1979},
   title = {Measuring the psycological complexity of software maintenance tasks with the Halstead and McCabe metrics},
   journal = {IEEE Transactions on Software Engineering},
   volume = {5},
   pages = {96-104}
}