参考文献

Tarpanov, Velichko; Vlahov, Radoslav; Penkov, Miho; Krikorian, Dikran; Parushev, Stoyan; Mechkarova, Pepa; Angelova, Nely; Schunack, Walter Synthetic Communications, 1999 , vol. 29, # 1 p. 15 - 20