BirdsGuide

50. Paszfor L., Meszena G., Norok J. Density - dependent success in Large, natural broods of the Collared Flycatcher ( Ficedula albicollis) in bad years // 3 rd Congr. E.S.E.B., Peobrecen, Sept, 1-5, 1991 : Abstr.,- S.1, [ 1990]. - P. 228.

51. Pavelka J. Potrava mladat Lejska cernohlaveho, Ficedula hypoleuca ( Pall) // Cas. Slezsk. Muz. A.,- 1990.-39,№9.- P.271-275.

Sorensen O., Hagvar S., Lund E. Reproductive success in the pied flycatcher Ficedula hypoleuca // Fauna norv. Ser. C., - 1990.- 13, №1.- P. 42-46.