@article{Fredricksen1986b, 
     author = "Fredricksen, Harold and {J. Kessler}, Irving", 
     doi = "10.1016/0012-365X(86)90089-0", 
     issn = "0012365X", 
     journal = "Discrete Mathematics", 
     link = "http://www.sciencedirect.com/science/article/pii/0012365X86900890 http://linkinghub.elsevier.com/retrieve/pii/0012365X86900890", 
     month = "sep", 
     number = "2-3", 
     pages = "181--188", 
     title = "An algorithm for generating necklaces of beads in two colors", 
     uri = "http://www.sciencedirect.com/science/article/pii/0012365X86900890", 
     volume = "61", 
     year = "1986", 
}

Problems: 360