The Poletskii and V\"{a}is\"{a}l\"{a} inequalities for the mappings with   $(p, q)$--distortion
  The present paper is devoted to the study of space mappings, which are more general than quasiregular. The so--called modulus inequalities for some class of mappings are obtained. In particular, the analogues of the well--known Poletskii and V\"{a}is\"{a}l\"{a} inequalities were proved. 
Ruslan Salimov and Evgeny Sevost'yanov
math.CV