@article{Wells1961, 
     author = "Wells, Mark B.", 
     doi = "10.1090/S0025-5718-1963-0159764-2", 
     journal = "Mathematics of Computation", 
     link = "http://www.ams.org/journals/mcom/1961-15-074/S0025-5718-1961-0127507-2/home.html", 
     number = "74", 
     pages = "192--195", 
     title = "Generation of permutations by transposition", 
     uri = "http://www.ams.org/journals/mcom/1961-15-074/S0025-5718-1961-0127507-2/home.html", 
     volume = "15", 
     year = "1961", 
}

Problems: 381