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20022009
most citedQuantum ESPRESSO: a modular and open-source software project for quantum simulations of materials

29.3k citations

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astro-ph2006★ 31 cited

74 MHz Discrete HII Absorption Regions Towards The Inner Galaxy

Michael E. Nord, P. A. Henning, R. J. Rand +2

At low radio frequencies (< 100 MHz), classical HII regions may become optically thick (optical depth > 1) and can be observed as discrete absorption regions against the Galactic n…