Covariant quantization of the string in dimensions<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>D</mml:mi><mml:mi>≤</mml:mi><mml:mn>26</mml:mn></mml:math>using a Becchi-Rouet-Stora formulation

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