@article{Liu1973,

Author = {C. L. Liu and James W. Layland},
Journal = {Journal of the Association for Computing Machinery (JACM)},
Month = jan,
Number = {1},
Pages = {46-61},
Title = {{Scheduling Algorithms for Multiprogramming in a Hard Real-Time Environment}},
Volume = {20},
Year = {1973}

}

@book{Liu2000, author = {Liu, Jane W. S. W.},

 title = {{Real-Time Systems}},
 year = {2000},
 isbn = {0130996513},
 edition = {1st},
 publisher = {Prentice Hall PTR},
 address = {Upper Saddle River, NJ, USA}} 

@phdthesis{Mok1983,

Author = {A. K. Mok},
School = {MIT},
Title = {{Fundamental Design Problems for the Hard Real-Time Environment}},
Type = {{Ph.D. Dissertation}},
Year = {1983}}