Bohr, Henrik; Nielsen, H. B. (1977). "Hadron production from a boiling quark soup: quark model predicting particle ratios in hadronic collisions". Nuclear Physics B. 128 (2): 275. डीओआइ:10.1016/0550-3213(77)90032-3. बिबकोड:1977NuPhB.128..275B.
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Bohr, Henrik; Nielsen, H. B. (1977). "Hadron production from a boiling quark soup: quark model predicting particle ratios in hadronic collisions". Nuclear Physics B. 128 (2): 275. डीओआइ:10.1016/0550-3213(77)90032-3. बिबकोड:1977NuPhB.128..275B.