@book{mccabe_2005, title={Unit operations of chemical engineering (7th ed.)}, ISBN={0072848235}, publisher={Boston: McGraw-Hill}, author={McCabe, W. L.}, year={2005} }
 @book{mccabe_2001, title={Unit operations of chemical engineering (6th ed.)}, ISBN={0070393664}, publisher={Boston: McGraw Hill}, author={McCabe, W. L.}, year={2001} }
 @book{mccabe_1985, title={Unit operations of chemical engineering (4th ed.)}, publisher={New York: McGraw-Hill}, author={McCabe, W. L.}, year={1985} }
 @book{mccabe_1956, title={Unit operations of chemical engineering}, publisher={New York: McGraw-Hill}, author={McCabe, W. L.}, year={1956} }