1. Русак О.Н., Николаев Ю.Н. of the // Записки Горного института. 1969. Том 58№ 1. C. 169-173.

1. Rusak O.N., Nikolaev Y.N. To On the question of underground thermal insulation of horizons insulation at the mines of the Apatit Combine // Journal of Mining Institute. 1969. Том 58№ 1. C. 169-173.