RISC RISC Research Institute for Symbolic Computation  
  • @mastersthesis{RISC3275,
    author = {Nikolaj Popov},
    title = {{Periodic Interactions}},
    language = {english},
    year = {1998},
    month = {November},
    translation = {0},
    school = {Department of Mathematical Logic and Applications, Faculty of Mathematics and Computer Science, Sofia University, Bulgaria},
    length = {78}
    }