Pavel Sroka, Arnold H. Staniczek. Retention of cervical and abdominal gills in the adult of a new fossil stonefly (Insecta, Plecoptera, Petroperlidae) from mid-Cretacous Burmese amber (англ.) // Cretaceous Research : Журнал. — 2020. — Vol. 107, no. 104277. — P. 1—6. — ISSN0195-6671. — doi:10.1016/j.cretres.2019.104277.
Pavel Sroka, Arnold H. Staniczek. Retention of cervical and abdominal gills in the adult of a new fossil stonefly (Insecta, Plecoptera, Petroperlidae) from mid-Cretacous Burmese amber (англ.) // Cretaceous Research : Журнал. — 2020. — Vol. 107, no. 104277. — P. 1—6. — ISSN0195-6671. — doi:10.1016/j.cretres.2019.104277.