This article about behaviour and diet of Short-toed Eagles in the Forestry of Smilde in Western Drenthe /map/ is available on Natuurtijdschriften:
• Rob G. BIJLSMA, 2019 – Gedrag en voedsel van Slangenarenden Circaetus gallicus in een potentieel broedgebied in Nederland [Behaviour and diet of Short-toed Snake Eagles in a potential breeding area in The Netherlands] // De Takkeling, Vol. 27, No. 3: pp. 210-226. – 
(Nl).
After the first reports of the breeding of Short-toed Eagle in Switzerland, the successful attempt was observed in Central Valais /map/ in 2017:
• Raphaël ARLETTAZ, Stéphane METTAZ & Klaus AGTEN, 2018 – Première nidification réussie du Circaète Jean-le-Blanc Circaetus gallicus en Suisse romande [The first successful nesting of Short-toed Eagle in Romandy] // Nos Oiseaux 65/3, N° 533: pp. 175-179. – (Fr).
The article is available on the University of Bern website.
Diet and breeding site characteristics of six different raptor species, including STE, in Central India are compared in the following article:
• Satish PANDE, Reuven YOSEF, Federico MORELLI, Rajkumar PAWAR and Ram MONE, 2018 – Diet and habitat affinities in six raptor species in India // Avian Research, 9:36. doi:10.1186/s40657-018-0129-2 – (En).
That is a region where Short-toed Snake Eagles have potential food competitors. Besides, data on their diet and habitats in the Indian part of the distribution area are of great interest in themselves.
The article by Lionel Maumary and others contains the detailed description of the first ST Eagle breeding in Switzerland /map/ in 2012, observations of the breeding biology and the diet data particularly:
• Lionel MAUMARY, Hubert DUPERREX, Jacques CLOUTIER, Laurent VALLOTTON, 2013 – Première nidification du Circaète Jean-le-Blanc (Circaetus gallicus) en Suisse – Observations sur la biologie de reproduction, en particulier le régime alimentaire [The first nesting of Short-toed Snake Eagle in Switzerland – Observations of the reproductive biology, and the diet] // Nos Oiseaux, 60: pp. 3-24. (Fr) {rough translation}.
There are some fresh videos for April: three of them have been made with the camera installed at a nest of Short-toed Eagles in Israel /map/ by Guilad Friedemann.
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The last two ones were taken from a distance in Northern Ukraine /map/ by me. Please note that all the clips are available in HD quality.
Many thanks to Guilad Friedemann for kind information about a new project of the KKL Fund – HD Web camera at a nest of Short-toed Eagle in Israel /map/. The online stream and a brief description of the project are available in Hebrew now, the English translation will appear soon. Besides, you can find texts about Guilad’s research in English and in Hebrew, view current data on observations of STE in the country and enjoy a video recently recorded with the installed camera; more clips are also listed on this page now. So help you Google Translate!
UPD May 1st, 2015: the Facebook community has been created for uploading and watching video clips made with the camera.
The following detailed article dedicated to ecological and ethological aspects of biology of Short-toed Eagle had been published 35 years ago. The text addresses a variety of topics and can be of great interest to anyone who is studying the species. It is printed on 87 pages, has many beautiful pictures and includes data on distribution and conservation of STE on the Italian Peninsula:
• Silvio BRUNO, Fabio PERCO, 1980 – Considerazioni ecologiche ed etologiche sul Biancone (Circaetus gallicus) [Ecological and ethological considerations on Short-toed Eagle] // Natura bresciana, vol. 17: pp. 124-210. – (It).
The article is available on the Museo di Scienze webpage.