TY - JOUR TI - A modular bottom-up approach for constructing physical input–output tables (PIOTs) based on process engineering models PY - 2018 AU - Liz Wachs AU - Shweta Singh T2 - Factor X: Challenges, Implementation Strategies and Examples for a Sustainable Use of Natural Resources DO - 10.1186/s40008-018-0123-1 ER -