Institut pochvovedeni︠i︡a i fotosinteza (Akademi︠i︡a nauk SSSR), Nauchnyĭ ︠t︡sentr plodorodi︠i︡a pochv (Czechoslovakia), Hraško, J., & Kefeli, V. I. (1990). Povedenie poll︠i︡utantov v pochvakh i landshaftakh: Sbornik nauchnykh trudov. Nauch. ︠t︡sentr biologicheskikh issl. AN SSSR.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিInstitut pochvovedeni︠i︡a i fotosinteza (Akademi︠i︡a nauk SSSR), Nauchnyĭ ︠t︡sentr plodorodi︠i︡a pochv (Czechoslovakia), Juraj Hraško, এবং V. I. Kefeli. Povedenie Poll︠i︡utantov V Pochvakh I Landshaftakh: Sbornik Nauchnykh Trudov. Pushchino: Nauch. ︠t︡sentr biologicheskikh issl. AN SSSR, 1990.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিInstitut pochvovedeni︠i︡a i fotosinteza (Akademi︠i︡a nauk SSSR), et al. Povedenie Poll︠i︡utantov V Pochvakh I Landshaftakh: Sbornik Nauchnykh Trudov. Nauch. ︠t︡sentr biologicheskikh issl. AN SSSR, 1990.