Яковлев Н.Н. И. П. Долбня. (Жизнь, воззрения, личность) // Записки Горного института. 1912. Т. 4 № 1. С. 18-28.
Yakovlev N.N. I. P. Dolbnya. (Life, views, personality) // Journal of Mining Institute. 1912. Vol. 4 № 1. p. 18-28.
The strong and vivid image of Ivan Petrovich is still before our eyes; it is still difficult to come to terms with the bitterness that this is only an image, that Ivan Petrovich himself is gone. Having become a director, Ivan Petrovich did not seek to derive any special benefit from this for himself; he divided the director’s apartment into two parts and kept the worst one for himself; for example, he did not seek additional allocations for his assistants. He was a remarkably bright, original and richly gifted person.