The author of these photos is this studio. I came to this studio and asked them to publish their photos in their official group in the social network vk.com, here with the phrase Материалы этой страницы доступны на условиях лицензии Creative Commons Attribution-Share Alike 3.0. You can see this phrase in the description of the photo album and you can see that this vk.com group is mentioned as their official group on their website.