@article{Read1987, 
     author = "Read, Ronald C. and Hu, Guanzhang", 
     doi = "10.1002/jgt.3190110412", 
     issn = "03649024", 
     journal = "Journal of Graph Theory", 
     month = "jan", 
     number = "4", 
     pages = "539--553", 
     title = "On the construction and enumeration of minimal blocks", 
     volume = "11", 
     year = "1987", 
}

Problems: 492