ResearchGate

researchgate.net

सोशल नेटवर्क जहां authors खुद अपने पेपर अपलोड करते हैं। journal version paywalled होने पर भी अक्सर यहां फ्री full-text कॉपी मिल जाती है — हार मानने से पहले यहां जरूर देखें।

Worth checking before giving up on a paywalled paper, since authors frequently upload their own copy here even when the journal version costs money. Good habit for building out a notebook's source list when a key citation looks locked. The uploaded version can be a preprint or author manuscript that differs slightly from the final published text, and publishers sometimes force takedowns, so links aren't always permanent.