@article{Bellert1962, 
     author = "Bellert, S.", 
     doi = "10.1016/0016-0032(62)90042-X", 
     issn = "00160032", 
     journal = "Journal of the Franklin Institute", 
     month = "dec", 
     number = "6", 
     pages = "425--443", 
     title = "Topological analysis and synthesis of linear systems", 
     volume = "274", 
     year = "1962", 
}

Problems: 478