@article{Poe06NN ,
    author = {Georg P\"olzlbauer and Michael Dittenbach and Andreas Rauber},
    title = {Advanced visualization of Self-Organizing Maps with vector fields},
    journal = {Neural Networks},
    volume = {19},
    number = {6--7},    
    year = {2006},
    month = {July--August},
    pages = {911--922},
    doi = {10.1016/j.neunet.2006.05.013}
}