@Book{curri,
   author = {Adams,J.F. and Smith,D.J.},
   year = {2019},
   title = {Introduction to fixed-income valuation. In CFA Program Curriculum 2020 Level I Volumes 1-6. (Vol. 5, pp. 107-151).},
   publisher = {Wiley Professional Development (P&T)},
   isbn = {9781119593577} ,
   url = {https://bookshelf.vitalsource.com/books/9781119593577},
 }
 @Book{barbara,
   author = {Petitt,B.S.},
   year = {2019},
   title = {Fixed Income Analysis (4th Edition)},
   publisher = {Wiley Professional Development (P&T)},
   isbn = {9781119628132} ,
   url = { https://bookshelf.vitalsource.com/books/9781119628132},
 }
 @Book{fab,
   author = {Fabozzi,F.J.},
   year = {2007},
   title = {Fixed Income Analysis (2nd Edition)},
   publisher = {Wiley},
   isbn = {9780470052211} ,
 }
@Book{fifa,
   author = {Fabozzi,F.J.},
   year = {2008},
   title = {Handbook of Finance: Financial Markets and Instruments},
   publisher = {John Wiley & Sons, Incorporated},
   isbn = {9780470078143} ,
 }
